You and your baby at 5 weeks pregnant
Your baby at 5 weeks
The baby's nervous system is already developing, and the foundations for its major organs are in place. At this stage, the embryo is around 2mm long.
The heart is forming as a simple tube-like structure. The baby already has some of its own blood vessels and blood begins to circulate.
A string of these blood vessels connects the baby and mother, and will become the umbilical cord.
At the same time, the embryo's outer layer of cells develops a groove and folds to form a hollow tube called the neural tube. This will become the baby's brain and spinal cord.
Defects in one end (the "tail end") of the neural tube lead to spina bifida. Defects in the "head end" lead to anencephaly, when the bones of the skull do not form properly.
Folic acid prevents spina bifida. You should start taking it as soon as you find out you're pregnant (even before you get pregnant, if possible).
You at 5 weeks
This is the time of the first missed period, when most women are only just beginning to think they may be pregnant.
Find out what to expect on your NHS pregnancy journey.
Antenatal care (also called pregnancy or maternity care) is the care you get from midwives and doctors during your pregnancy to make sure you and your baby are as well as possible.
Contact your GP or your preferred maternity service promptly once you know you're pregnant so you start getting care at the right time. They'll arrange your first midwife appointment.
Find maternity services near you
Starting your maternity care early in pregnancy is important if you have a health condition that may affect your pregnancy, such as heart or lung conditions, epilepsy, mental health problems, diabetes or asthma.
Your doctor or midwife will be able to advise you if you're taking medicines for your condition while you're pregnant, and provide the specialist care you and your baby need.
Do not stop taking any prescribed medicine without checking with your doctor or midwife first.
Things to think about
The Start4Life site has more about you and your baby at 5 weeks of pregnancy.
You can sign up for Start4Life's weekly emails for expert advice, videos and tips on pregnancy, birth and beyond.
Video: is the pregnancy test accurate?
In this video, a midwife explains when you can take a pregnancy test and how to do it properly.
Media last reviewed: 5 February 2020
Media review due: 5 February 2023
5 Weeks Pregnant
At 5 weeks pregnant, you’re now in month 2 of your pregnancy. This week, you can officially take a pregnancy test — your hCG hormone levels are high enough to show a positive result, and you may have early symptoms like fatigue and nausea.
As for your baby? The embryo is starting to look more like a fetus, and your little one's heart and circulatory system are developing.
Your Baby at Week 5
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Welcome to week five of your pregnancy, the beginning of your second month (hey - only seven more to go!). Your pregnancy is still new, but that embryo inside of you is growing fast and furious… from the size of a poppy seed last week to as big as an orange seed right now — around one-twentieth of an inch long. Still pretty small, but a lot bigger than it’s been…and getting bigger every day!
Wondering what your growing baby looks like now? Not much like a baby. Your little one has elongated from a ball of cells to a teeny tadpole-like shape, with a distinguishable head and, believe it or not, a tail. Not to worry, though. That tail will disappear soon enough, and a cute little baby bottom will take its place.
This week a primitive heart begins to form and beat, pumping blood through your embryo’s emerging shape. The heart comes first because blood flow is essential. Without that blood flow, organs and the digestive and nervous systems won’t be able to form. At this early stage the design of the micro heart is still pretty rustic, with only two tubes pumping to a really unrhythmic rythym. The heart won’t be fully functional until those tubes fuse together and the heartbeats coordinate — activity that requires a brain!
Fortunately, your baby’s brain is well past the blueprint phase. The neural tube, which will ultimately become baby’s spinal cord and brain, is under construction. And if that’s not enough body building going on, a rudimentary digestive system is taking shape, too. There’s a tube extending from the mouth to the tail of the embryo… and this tube will eventually turn into the stomach, liver, pancreas, and intestines.
At a Glance
The placenta forms
The placenta is under construction and will finish forming by the end of the first trimester. It’s an organ that will soon connect your developing fetus to your uterine wall, providing baby-to-be with nutrients and oxygen.
Positive pregnancy test
Your hCG hormone levels are now high enough to confirm you're having a baby in a home pregnancy test.
From embryo to fetus
That mass of cells we call an embryo is starting to look like a fetus, with a forming neural tube (pre-spinal cord and brain) running from head to rump.
5 weeks pregnant is how many months?
If you're 5 weeks pregnant, you're in month 2 of your pregnancy. Only 7 months to go! Still have questions? Here's some more information on how weeks, months and trimesters are broken down in pregnancy.
How big is my baby at 5 weeks?
At 5 weeks pregnant, your little embryo is still super tiny, measuring about the size of an orange seed.
Baby has a tail
So what does your baby look like now? Actually, not unlike a tadpole, with a rudimentary head and a tail. But don't worry, there's no frog in your future.
In fact, you're fewer than eight months away from holding a real prince or princess in your arms. While all this is happening, the hCG hormone levels in your body are now high enough to confirm that you're expecting using a home pregnancy test. Go to the doctor to confirm the good news and figure out your due date.
The heartbeat may be visible
It takes a lot of developing to become a baby — all the major and minor bodily systems (digestive, circulatory, nervous and so on) and organs, like the heart, lungs and stomach, have to form from scratch.
The first system to be operational is the circulatory system, or blood — along with its companion organ, the heart, which you may even be able to see beating on an early ultrasound toward the end of the week, though it's more commonly visible at week 6 or 7.
When you're 5 weeks pregnant, your baby's heart is made up of two tiny channels called heart tubes and they're already hard at work. When those tubes fuse together, your baby will have a fully functioning heart, though he almost certainly has his grip on yours already!
Also in the works this week are several other organs, including the neural tube — the precursor to your baby's brain and spinal cord — which hasn't yet sealed. But by next week, that open-door policy is over.
Your Body at Week 5
HCG and home pregnancy tests
By now you should have missed your period — one of the more obvious indications that you're pregnant. It's time to pee on a stick (good news since you probably need to go more often anyway), because at 5 weeks pregnant the level of hCG, the pregnancy-announcer hormone, in your urine is high enough to be detected by a home pregnancy test.
That means you'll be able to confirm what you probably already suspect: You're expecting!
This news will probably elicit a combo platter of emotions ranging from sheer joy to sheer terror as the reality that you're going to be a mom sets in. Mood swings are totally normal — kind of like PMS on overdrive — so don't worry if you're having them.
Early pregnancy signs
There'll be other early pregnancy signs, too. Like that sense of exhaustion that may have washed over you. And those tender breasts. Or that slight bout of nausea you might have felt when you smelled a dish that normally doesn't bother you.
Growing a baby — even one no larger than an orange seed — is hard work, and your body is responding in kind.
Pregnancy hormones kick in
Large quantities of hormones — chemical signals that circulate in your body and work together to cause physical changes — are being mass-produced this week.
Among them are estrogen, which keeps the levels of progesterone and hCG up where they need to be; progesterone, which maintains the function of the placenta, keeps the smooth muscles of the uterus from contracting, and stimulates breast tissue growth; and hCG, which support the corpus luteum until the placenta takes over at about 10 weeks and regulates the amount of progesterone necessary.
And don't be surprised if you feel like these hormones are taking over your life sometimes!
Telling your friends you're pregnant
Have you or your partner been bursting to spread the good news about your expectant status ever since that home pregnancy test turned positive? Not sure when the best time is to grab a megaphone (or a telephone ... or a computer keyboard) and start sharing? Only you can make the call, so to speak, on that one.
Some women (and their partners if they have them) can't wait to tell their friends they're pregnant — if they could, they'd shout it from the highest mountain or make the announcement go viral — while others prefer to keep their happy news on the DL until after the third month, when the risk of miscarriage greatly decreases.
Still others wish that they could stay mum about becoming a mom (or dad ... or second parent of any kind) but can't help blabbing the first chance they get. Talk to loved ones for advice, and remember, it's your little secret for as long as you choose.
Learn more about spreading the news.
Pregnancy Symptoms Week 5
Suddenly struck by an overpowering urge to eat a grilled cheese sandwich? Can’t stand the sight of salads — or greens in general? Welcome to the wacky world of food cravings and aversions. Hormones play a role here (as they do in most pregnancy symptoms) — especially in these early weeks when your body is getting used to the hormonal havoc. If you can’t beat ’em, join ’em — within reason. Indulge your chocolate cravings with a mini bar instead of a king-sized one and find healthy substitutes for the foods you can’t stand, like drinking a glass of V8 instead of eating a salads. Read More
Pregnancy is hard work, and that can cause a downshift in your get-up-and-go. During the first trimester, a huge amount of energy goes into building a life-support system for your baby, especially the placenta, which can leave you feeling just a bit tired or full-on wiped out. Also to blame are the hormonal and emotional changes that are happening. The good news: By the end of your first trimester, your body will have completed the Herculean task of manufacturing the placenta, so you might feel a renewal of energy. In the meantime, listen to your body, which is telling you it’s burned out. Get plenty of rest and eat right — and often! Read More
That queasy feeling in your stomach, which can sometimes lead to vomiting, can hit at any time of the day or night (not just morning!). It’s especially common in the first trimester, thanks to some unknown combination of hormones, increased stress and other body changes, like a keener sense of smell. To keep nausea under control, try eating a few crackers first thing in the morning. Whatever you do, don’t skip meals — even if the thought of eating makes you feel a little sick. Instead, be a grazer: Stick to foods that appeal to you, and try to follow a healthy diet. Read More
Horrified to find your mouth watering for no reason at all? If so, you might be experiencing early pregnancy’s double whammy: a queasy tummy and excessive saliva — and yes, you can blame those pesky pregnancy hormones for those symptoms, too! How to deal with the drool? Chewing sugarless gum can help your mouth stay a little dryer. Read More
Tips for You This Week
Avoid the litter box
Score! You're off litter-box duty for the duration of your pregnancy. That's because cat feces can harbor a parasite that causes toxoplasmosis, an infection that isn’t good for unborn babies.
You also shouldn't eat raw or undercooked meat or feed it to your cat, and you shouldn't play in or clean out a child's sandbox, which could be used as a litter box by local outdoor kitties. Ask your partner, a friend or a relative to help out.
Schedule a teeth cleaning
Teeth cleanings are a good thing — especially because about 40 percent of the pregnant set have periodontal disease, which ups their chance of preeclampsia (a pregnancy complication that's characterized by high blood pressure).
Dental X-rays should be saved until after baby arrives, though, unless the risk of not having one done outweighs the relatively small risk of radiation to the fetus.
If you do have an X-ray, wear a lead apron or abdominal shield over your lower belly.
Know your off-limits foods
It’s time to take some foods off the menu, including unpasteurized dairy and juices, undercooked meat and eggs, raw sprouts, and mercury-laden or raw fish (they can cause foodborne illnesses that can be bad for baby).
Other foods to avoid include hot dogs and deli meats, which can harbor nitrates and nitrites. You should also cut back on caffeine and stop drinking alcohol (if you haven't already).
Soothe an upset stomach
Need to quell a queasy stomach? Try noshing on a snack that's rich in protein and complex carbs, like whole wheat crackers and cheese or some granola and yogurt. Or skip the solids and sip on soup or a smoothie.
Make sure you get eight to 10 glasses of fluids from all sources a day, especially if vomiting is leaving you dehydrated. Ginger can also be good for what ails you. Use it in cooking — like in ginger-carrot soup or ginger muffins — infuse your tea with it, nibble on some ginger biscuits, nosh on some crystallized ginger or suck on some ginger candy.
And if your symptoms are particularly rough, ask your practitioner about taking a vitamin B6 supplement or switching your prenatal vitamin from one loaded with iron to one higher in B6.
Learn how to manage bloat
Gas: It's like a cosmic joke — some of the healthiest foods can leave you feeling gassy…and not at all in the mood to eat your veggies. And gas and bloating are par for the course when you’re pregnant, thanks to pregnancy hormones.
Opt for healthy substitutions that won't bring on the bloat — for example, mangoes instead of broccoli or strawberries instead of cabbage.
Pop bagel chips instead of potato chips and eat poached chicken breast instead of those once-beloved chicken fingers.
Another simple way to deflate pregnancy tummy bubbles: Instead of sparkling water, sip plain water instead.
Exercise for morning sickness?
Should you or shouldn't you work out in the first trimester, especially when you're grappling with morning sickness? That all depends on how a workout makes you feel.
If the queasies have you down at 5 weeks pregnant, try stepping outside for a brisk walk. Chances are, you'll feel better after about 15 minutes — both from the fresh air and the exercise.
Other workouts are fine, too, if they sit well with your stomach. Just make sure you have a tummy-approved snack (nothing that's likely to come back up during warm-ups) before and after you workout, and don't forget to stay hydrated.
Pick your proteins
You know you need your protein, but you've had a falling out with meat (and chicken, and fish…) and now you can't be in the same room together, never mind share a plate.
You'll eventually be able to stomach these meaty foods again, but until then, pick up protein from cottage cheese, yogurt, beans or soy products, especially tofu or edamame. Or consider quinoa, a nutty grain that packs a super-punch of protein in a comforting package.
If it's leafy greens that turn you a not-so-delicate shade of chartreuse, brighten up your diet with yellow vegetables (which are often easier to take), like carrots or yams. Or go for the beta-carotene in cantaloupe, mangoes, peaches and apricots.
From the What to Expect editorial team and Heidi Murkoff, author of What to Expect When You're Expecting. What to Expect follows strict reporting guidelines and uses only credible sources, such as peer-reviewed studies, academic research institutions and highly respected health organizations. Learn how we keep our content accurate and up-to-date by reading our medical review and editorial policy.
- What to Expect When You’re Expecting, 5th edition, Heidi Murkoff.
- WhatToExpect.com, Eating Fish During Pregnancy: What Varieties Are Safe?, June 2020.
- WhatToExpect.com, Eating Vegetarian and Vegan During Pregnancy, June 2020.
- WhatToExpect.com, Toxoplasmosis During Pregnancy, March 2021.
- WhatToExpect.com, Sore and Bleeding Gums During Pregnancy, October 2020.
- WhatToExpect.com, Dental Care During Pregnancy, October 2018.
- WhatToExpect.com, Listeria Exposure During Pregnancy, September 2020.
- WhatToExpect.com, Prenatal Vitamins and Nausea, January 2020.
- WhatToExpect.com, Morning Sickness and Nausea During Pregnancy, June 2021.
- WhatToExpect.com, What to Do About Bloating During Pregnancy, February 2021.
- WhatToExpect.com, Exercises to Avoid During Pregnancy, December 2019.
- American College of Obstetricians and Gynecologists, How Your Fetus Grows During Pregnancy, August 2020.
- National Institutes of Health, National Library of Medicine, Fetal Development, June 2021.
- National Institutes of Health, Eunice Kennedy Shriver National Institute of Child Health and Human Development, How Do I Know If I’m Pregnant?, January 2017.
- National Institutes of Health, National Library of Medicine, The Basics of Brain Development, December 2010.
- Society for Endocrinology, Hormones of Pregnancy and Labour, March 2018.
- American College of Obstetricians and Gynecologists, Early Pregnancy Loss, February 2020.
- National Institutes of Health, National Library of Medicine, Pickles and Ice Cream! Food Cravings in Pregnancy: Hypotheses, Preliminary Evidence, and Directions for Future Research, September 2014.
- University of Rochester Medical Center, First Trimester Fatigue, 2021.
- American College of Obstetricians and Gynecologists, Morning Sickness: Nausea and Vomiting of Pregnancy, May 2020.
- UpToDate, Treatment and Outcome of Nausea and Vomiting of Pregnancy, May 2021.
- National Institutes of Health, National Library of Medicine, Ptyalism Gravidarum, November 2009.
- Centers for Disease Control and Prevention, Toxoplasmosis: Pregnancy FAQs, September 2020.
- American College of Obstetricians and Gynecologists, Oral Care During Pregnancy and Through the Lifespan, 2017.
- American Dental Association, Is It Safe to Go to the Dentist During Pregnancy
- FoodSafety.gov, People at Risk: Pregnant Women, September 2020.
What to Expect selects products based on independent research and suggestions from our community of millions of parents; learn more about our review process. We may earn commissions from shopping links.
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5 Weeks Pregnant
You’ve just been initiated to the pregnancy club! Week 5 is a common time for moms-to-be to find out they’re pregnant. That’s because by now you’ve probably realized you’ve missed your period and then thought, whoa—maybe I should take a test! Plus, at 5 weeks pregnant, heightened hormone levels may be giving you symptoms that are tough to ignore, like sore breasts, nausea and fatigue. (Those same hormones are the ones your pregnancy test detected to give you a positive result.) Okay, so the “club” might not be so fun right now, but you’ll eventually be so glad you were a member. For updates on what’s happening with you and baby throughout your pregnancy, sign up for The Bump pregnancy week-by-week newsletter emails.
How Big Is Baby at 5 Weeks Pregnant?
At 5 weeks pregnant, baby is the size of an apple seed. Yep, your embryo is now measurable—though at week five of pregnancy, it's a wee 0.13 inches from crown to rump (a.k.a. head to bum)—and baby's gearing up for much more growth. In fact, in the next week they’ll almost double in size. Grow, baby, grow!
5 Weeks Pregnant Is How Many Months?
At 5 weeks pregnant, you're entering your second month of pregnancy. Yep, you just discovered you’re pregnant and you’ve already got one month in the books! That’s because most doctors start counting pregnancy from the first day of your last period. But here’s the thing: While many people think of pregnancy as lasting 9 months, it’s really 40 weeks long. If you’re counting four weeks to a month, that adds up to 10 months! Of course, some months have five weeks. That’s why many doctors avoid tracking pregnancy by month and refer to your progress simply by week.
The pregnancy symptoms you feel at 5 weeks are just the beginning of the slew of changes your body is about to go through. No need to dread the entire pregnancy based on what’s happening right now: Many moms-to-be say the first trimester is the toughest, so think of it as getting the rough stuff out of the way early. In the meantime, take care of yourself and get plenty of rest, eat right and figure out ways to help yourself feel better. If you’re wondering what to expect at 5 weeks pregnant, here’s what’s most common:
- Sore breasts. Morning sickness gets all the attention, but aching breasts may actually be the most common symptom at 5 weeks pregnant.
- Morning sickness. This bad boy is so inaccurately named. Nausea in early pregnancy can happen at any time of the day, not just morning. And unfortunately, some pregnant moms feel queasy pretty much all day. In fact, if you’re 5 weeks pregnant with twins, you may be more likely to have severe morning sickness. Experiment with different strategies to find what helps you deal with the queasies best. Eating small, frequent meals is one good one. You might also try Vitamin B6, ginger capsules, special nausea-reducing lozenges or lollipops and acupressure wristbands.
- Fatigue. At 5 weeks pregnant, it’s normal to want to nap in the middle of a board meeting, a dinner date, a… well, pretty much any time. You’re zapped from making a baby and there’s not much you can do about it except get some extra rest, do some light exercise and eat every few hours.
- Frequent urination. You might notice yourself having the urge to pee more often early in pregnancy. This symptom at 5 weeks pregnant is in part because your kidneys are actually expanding. (Whoa!)
- Cramps. Around 4 or 5 weeks, cramping could be a sign the embryo has implanted nicely into the lining of your uterus. Or it could be a sign your uterus is expanding and stretching your ligaments. If you’re feeling cramping at 5 weeks pregnant that’s severe or painful, call your doctor and get checked out to make sure it’s not a sign of a problem.
- Spotting. When you’re 5 weeks pregnant, spotting can seem scary, but a little blood on your underwear could also be a sign of implantation. You might also spot a bit after sex, since your cervix is more sensitive now that you’re pregnant. This is totally normal, but if you’re having something that’s less like spotting and more like bleeding at 5 weeks pregnant—or really, if you’re concerned at all—call the doctor.
Some moms-to-be who are 5 weeks pregnant feel no symptoms at all. Or it might feel like, at 5 weeks pregnant, symptoms come and go. And all of that is totally okay! Just because you’re not feeling sick or sore doesn’t mean there’s something wrong with the pregnancy. It just means you’re lucky!
What should I expect at 5 weeks pregnant?
The experience at 5 weeks pregnant can vary a lot from person to person, so it might be best not to expect anything specific, but to prepare for everything. If nothing else, you’re likely to feel more tired than usual, and your body is probably just starting to feel a little wonky, but hopefully you’re not in the thick of it quite yet. If your symptoms are severe, there’s never any harm in calling your doctor to check in (and possibly check for multiples!).
Should I See a Doctor At 5 Weeks Pregnant?
Unless you have any reason to believe there’s a problem with your pregnancy, there’s no real reason to see your doctor quite yet. The first prenatal appointment often takes place around week 8 or 9
Fetus 5 week
Pregnancy at week 5
By week 5, your baby has burrowed into the wall of your uterus. It is now called an embryo and measures about 2mm from end to end. The foundations for all of the major organs are in place. The baby is inside an amniotic sac, a bag of fluid that protects it.
The cells in the baby are still dividing. In week 5, the brain and spinal column are already starting to form. The spinal cord is called the neural tube and is developing as an open groove. Your baby’s head is much larger than the rest of the body at this stage as the brain and face are developing very rapidly.
Your baby’s heart will start beating this week. The blood vessels are already starting to form and blood is circulating in the baby’s body. A string of blood vessels connects you to your baby, and this will eventually become the umbilical cord.
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Week 5 is when most women start to wonder whether they may be pregnant. You will have missed your period, but you may be feeling like it’s just about to start. You may notice your breasts are larger and feel sore, and you may be feeling quite tired.
Some women may feel nauseous, or notice they need to go to the toilet more often than usual.
You will also be producing more human chorionic gonadotropin (hCG).
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Things to remember
You can do a pregnancy test the day after you miss your period. There are many different tests available, so make sure you follow the instructions carefully.
If the pregnancy test shows you’re pregnant, it’s a good idea to see your doctor as soon as possible. They will confirm you are pregnant and advise you on how to look after yourself and your baby.
Finding out you’re pregnant can be very exciting. But for some women, pregnancy is unplanned. Whether the baby was planned or not, you may feel a range of emotions from joy to surprise to shock.
It’s important not to drink any alcohol, smoke cigarettes or take illicit drugs if you’re pregnant since these can all be very harmful for your baby.
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Sources:Raising Children Network(Pregnancy week-by-week), Women's and Children's Health Network(The first 3 months of pregnancy: the first trimester), Parenthub(5 weeks pregnant), Australian Journal of General Practice(Preconception care)
Learn more here about the development and quality assurance of healthdirect content.
Last reviewed: August 2019
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Baby development at 5 weeks
Deep in your uterus your tiny embryo is growing at a furious pace and looks more like a tadpole than a human. Your embryo is now made up of three layers – the ectoderm, the mesoderm, and the endoderm – which will later form all of the organs and tissues.
Your baby's brain, spinal cord, and nerves form from the neural tube, which is starting to develop from the top layer – the ectoderm. This layer will also give rise to skin, hair, nails, mammary and sweat glands, and tooth enamel.
The heart and circulatory system begin to form in the middle layer, or mesoderm. (This week, in fact, the tiny heart begins to beat and pump blood.) The mesoderm will also form your baby's muscles, cartilage, bone, and the tissue under the skin.
Lungs and gut
The third layer, or endoderm, will become the lungs, intestines, and early urinary system, as well as the thyroid, liver, and pancreas. In the meantime, the primitive placenta and umbilical cord, which deliver nourishment and oxygen to your baby, are already on the job.
Your baby at 5 weeksTap the plus for more details
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Your baby is about the size of a sesame seed
Pregnancy symptoms during week 5
Pregnancy hormones plus your body’s increasing blood volume may equal a near-constant need to pee. During pregnancy, running to the bathroom much more than you'd like is a fact of life. It’s important to stay hydrated, but you may want to cut back on fluids late in the day so you don’t have to get up to pee as frequently at night.
Tender, swollen breasts
Breast tenderness is often one of the earliest signs of pregnancy. Increased hormone levels boost blood flow, which may make your breasts feel swollen, sore, tingly, and unusually sensitive to touch.
No one knows for sure what causes bone-crushing exhaustion in early pregnancy, but it's likely that hormonal changes are to blame. Most women find that their energy returns in the second trimester. Until then, try to get more sleep, lighten your load, ask others for help, and take good care of yourself.
Morning sickness – also called nausea and vomiting of pregnancy – affects different expecting moms at different times (and some not at all). It usually starts around week 5 or 6 of pregnancy. For some women, that telltale queasy feeling is one of the first giveaways that they're pregnant. There are safe ways to get relief from morning sickness, including changes to your diet and lifestyle, natural remedies, and medication. Be sure to talk to your provider if you're suffering.
Does the smell of your partner’s lunch suddenly make your stomach churn? Food aversions often start around now. Most expecting moms experience them, thanks to changing hormones and heightened senses. Some of the most common aversions include meat, coffee, eggs, dairy, and foods with a lot of spices or fat. To cope, try eating bland or cold foods. If cooking makes you sick, ask a loved one to cook for you or get takeout.
Don't see your symptom?
Wondering about a symptom you have? Find it on our pregnancy symptoms page .
Your body at 5 weeksTap the plus for more details
Pregnancy checklist at 5 weeks pregnant
Choose a pregnancy healthcare provider
If you already have a doctor or midwife you love, you're set. If not, start doing some research. Talk to friends and relatives, ask one of your other providers to recommend someone, check out the preferred providers under your health insurance plan, or search online. Find out more about what to consider when choosing a doctor or midwife.
Put together a family health history
Talk to relatives on both sides about your families' medical histories. Your provider will want to know whether any chronic conditions or genetic abnormalities run in either of your families.
Get our pregnancy app
For expert pregnancy info, helpful tools, and detailed fetal development images, download BabyCenter's free pregnancy and baby app.
Take your prenatal vitamin
If you haven't started taking a prenatal vitamin yet, now's the time to start. It's particularly critical to get enough folic acid now, because it greatly reduces your baby's risk of developing neural tube birth defects such as spina bifida.
Cut down on caffeine
Studies have linked high caffeine consumption to miscarriage and other pregnancy problems. That's why the American College of Obstetricians and Gynecologists advises expectant moms to limit their caffeine intake to less than 200 mg per day (that's about one cup of coffee).
5 weeks pregnant bellies
At 5 weeks pregnant, your belly may be starting to look slightly different – perhaps like you had a big lunch. Or, you may not see any changes yet. There's no one-size-fits-all formula for how women show during pregnancy.
During the first trimester, nausea and vomiting may keep you from feeling like eating much. That's fine: your baby is tiny at this point, and you don't need to eat any extra calories. It's typical to gain about 3 to 5 pounds in the first trimester (and it's okay if you don't gain any weight at all).
This week's video
Kate MarpleKate Marple is a writer and editor who specializes in health, pregnancy, and parenting content. She's passionate about translating complicated medical information into helpful pregnancy and parenting advice that's easy to understand. She lives in San Francisco with her family.
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5 weeks pregnant - all you need to know
What does my baby look like?
Your tiny baby is 9mm, about the size of a little fingernail now.
Your baby’s hands and feet are still just little buds. Their skull bones close around their tiny, primitive brain.
The outer layer of the cushiony amniotic sac develops into the placenta. Its cells grow deep into the wall of your womb, creating a rich blood supply.
Your placenta will give your baby nutrients (food) and oxygen through their umbilical cord.
It has three vessels: One thick vessel carrying oxygenated blood and nutrients to the baby (they won’t breathe through their lungs until they're born - which is why waterbirths are safe), and two thinner vessels that carry blood containing waste-products back into your circulatory system.
The placenta is a remarkable lifeline that also keeps bacteria and viruses away from your baby.
Get weekly updates on your baby's development from our expert midwives straight to your inbox.
Your pregnancy symptoms in week 5
Pickles and ice cream – all about cravings
Have you been having cravings? Or maybe you’ve taken a sudden dislike to one of your favourite foods? Cravings aren’t uncommon in pregnancy but don’t worry if you don’t get any, because that’s very normal too. Read about the 10 most-common pregnancy myths.
What to do in week 5
Choosing the best nutrition for you and your baby
You might find it hard to believe you are truly pregnant as you are unlikely to have seen a midwife yet, but it’s time to start looking after yourself and your baby. This week we’re looking at food and nutrition in pregnancy.
Your body is working hard to grow a baby but it’s also very efficient, which means there’s no need to ‘eat for two’. You won’t need any extra calories until your final trimester (and at that point you will only need an extra 200 calories a day – about half a sandwich). If you have morning sickness eating small meals often to keep your blood sugar levels steady.
Find out what 200 calories looks like.
Not doubling your calories will also help you manage your weight in pregnancy. Find out more about how much weight you may gain here.
Eating a healthy, balanced diet in pregnancy will give you more energy and ensure your baby gets all the nutrients it needs.
“I used to eat a lot of junk food, but when I was pregnant I took healthy snacks to work instead - fruit, yoghurts and almonds - and I drank a lot of water.”
Nadia, mum of one
Find out more about managing your weight in pregnancy.
There are certain vital supplements in pregnancy: make sure you take a folic acid supplement to help your baby’s neural tube develop, and vitamin D.
What foods are off limits?
Trying to remember all the dos and don’ts in pregnancy – like which foods to avoid - feels complicated, but don't worry, and don't be too concerned if you have eaten something that is on the list, the risk is small. Talk to your midwife if you can't stop worrying about it.
Vegetarian or vegan?
It’s fine to follow a vegetarian or vegan diet in pregnancy but make sure it is varied and includes all the food groups. Learn more about planning your vegetarian or vegan diet to ensure your baby gets enough vitamin B12, riboflavin, iron, zinc, calcium and iodine.
Cutting down on caffeine
Too much caffeine is harmful to a growing baby so it’s important to limit your intake to 200mg a day now that you’re pregnant. You might be surprised to learn that caffeine is not just found in coffee, but also in tea, chocolate and energy drinks! Decaffeinated tea and coffee, fruit juice or water are all good choices if you are used to drinking a lot of caffeinated drinks. Use our caffeine calculator to see how much caffine is in your diet.