Week 15
of pregnancy

Fetal development

Height
~4 in
Weight
~3 oz
Weekly highlights
- 1Baby’s Development. Your baby is about 4 inches long. Facial features are shifting into place, ears are moving higher, and fine hair (lanugo) is starting to grow. The skin is still thin, and the heart is now circulating large amounts of blood each day. Baby is active, though movements are usually not felt until 18–20 weeks.
- 2Bodily Changes & Symptoms. As the second trimester progresses, you may notice more energy and possibly the start of a bump. Common symptoms can include nasal congestion, bleeding gums, mild swelling, back pain, or “pregnancy brain.” Weight gain may pick up as appetite returns.
- 3Health & Wellness. Support your body with hydration, light to moderate exercise, and good posture. Elevate or soak your feet to ease swelling, use saline drops for congestion, and practice gentle dental care to protect gum health. Supportive shoes and rest breaks can also help with back strain.
- 4Tips & To-Dos. This is a good time to explore childbirth classes, start nursery planning, and consider a baby registry. Many parents begin thinking about birth location and maternity leave now. Mid-pregnancy ultrasounds between 16–20 weeks may also reveal your baby’s sex if you’d like to know.
Checklist for week 15
- Start researching newborn essentials and preparing your baby shower registry. Download our registry checklist so you don’t miss something.
- If you don't have health insurance, go to HealthCare.gov to find out about coverage through Medicaid, CHIP, and other programs in your state.
- Ask your healthcare provider what your options are for places to give birth. Your choices may depend on what’s available in your area and what your health insurance covers if you have it.
- If you work, investigate your maternity leave options, including how much time is available to you and how much of it might be paid. You still have several months to go, but it’s helpful to plan ahead.
- Discover what’s in store for the rest of your pregnancy in our trimester-by-trimester guide.

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Now that you've reached 15 weeks, you may be entering the so-called “honeymoon” period of your pregnancy with an extra boost of energy. Here, we've assembled some information on your baby's development and the symptoms you may be experiencing, along with some insights, tips, and questions to consider when you're 15 weeks pregnant. We’ve got you covered, so relax and enjoy!
Highlights at 15 Weeks Pregnant
Your little one is growing and developing every day, and changes are happening in the way you look and feel at 15 weeks pregnant. Here are some highlights:
15 Weeks Pregnant: Your Baby’s Development
Of course, every baby develops differently! But here are some fetal developments your little one may be making at 15 weeks pregnant:
Download our pregnancy guide to learn more about what’s in store for you and your baby during the next weeks and months. And even though it may be too early to learn your baby’s gender at 15 weeks, you can have some (completely unscientific) fun with our Chinese gender predictor:

Chinese Gender Predictor
Can't wait to know whether your little one's a boy or a girl? Try our fun tool!How Many Months Is 15 Weeks Pregnant?
Weeks or months? Your pregnancy may be described in both ways, though weeks are more common. The 40 weeks of pregnancy can be assigned into months using various methods; however, at 15 weeks pregnant you’re likely in your fourth month of pregnancy, and you may have started to notice a belly bump and some additional symptoms!
“If I'm 15 weeks pregnant, when is my due date?” It's thrilling to think about the day you'll meet your new baby! Your healthcare provider will help you come up with this date, but in the meantime, try our Due Date Calculator to get an idea of when your little one may join the world.
How Big Is a Baby at 15 Weeks Pregnant?
Now that you’re 15 weeks pregnant, your fetus is about the size of a grapefruit, measuring about 4 inches long.
Your Baby: What Does 15 Weeks Pregnant Look Like?
Check out the illustration below to discover “what does a baby look like at 15 weeks pregnant,” in your second trimester.
Your Body at 15 Weeks Pregnant
Although every mom-to-be is unique, it’s not unusual for the bump to start showing sometime between 13 and 16 weeks of pregnancy.
If you’re ready to share the news of your pregnancy with the world, you might be happy to have a “show and tell” with your bump, but if you want to keep things under wraps for a little while longer you may want to grab some oversized tops to buy you some time.
In other news: Many moms-to-be report feeling less tired and more energized at this point in the pregnancy, sometimes called the honeymoon period! If you're experiencing this extra oomph of energy, enjoy it! Get some exercise, look into childbirth classes, find local parents’ groups, or start planning your baby’s room.
What’s your nursery style, anyway? Take our nursery style quiz to find out. And don’t forget to rest when you can!
15 Weeks Pregnant: Your Symptoms
At 15 weeks pregnant, here are some of the symptoms you may be experiencing:
How Big Is a Pregnant Belly at 15 Weeks?
As mentioned above, every pregnant belly develops at its own rate, and you may or may not be showing right now. It’s possible that your pregnant belly’s size will become more evident at around 15 weeks, as a baby bump usually starts to show around weeks 12 to 16. During your second trimester, your uterus is positioned higher and more forward and is growing out of your pelvis as it becomes bigger.
Whether you're showing or not, you may be curious to know if you can feel your baby move at 15 weeks. Your little one is becoming more active and is moving around inside your uterus; however, you may or may not have felt those movements yet at 15 weeks. It's likely that by around 18 to 20 weeks you'll feel your baby move for the very first time, which is known as quickening.
What Does 15 Weeks Pregnant Look Like?
For a better idea of what your belly might look like around 15 weeks pregnant, when you’re in your fourth month of pregnancy, check out the image below.
15 Weeks Pregnant: Things to Consider
We’re here to help you on your journey through pregnancy. Check out our handy list of important things to think about at 15 weeks pregnant:
15 Weeks Pregnant: Questions for Your Healthcare Provider
Your healthcare provider is there for you throughout your pregnancy, so feel free to consult them about any questions or concerns you have now and in the weeks to come. Some common questions at 15 weeks pregnant include:
FAQS AT A GLANCE
If you’re wondering how many months 15 weeks pregnant is, then look no further. Though there are various ways of dividing the weeks of pregnancy into months, at 15 weeks you're often considered to be around 4 months pregnant.
15 Weeks Pregnant: Your Checklist
The following to-dos may help you along as your pregnancy progresses:
□ Start researching newborn essentials and preparing your baby shower registry. Download our registry checklist so you don’t miss something.
□ If you don't have health insurance, go to HealthCare.gov to find out about coverage through Medicaid, CHIP, and other programs in your state.
□ Ask your healthcare provider what your options are for places to give birth. Your choices may depend on what’s available in your area and what your health insurance covers if you have it.
□ If you work, investigate your maternity leave options, including how much time is available to you and how much of it might be paid. You still have several months to go, but it’s helpful to plan ahead.
□ Discover what’s in store for the rest of your pregnancy in our trimester-by-trimester guide.
How We Wrote This Article The information in this article is based on the expert advice found in trusted medical and government sources, such as the American Academy of Pediatrics and the American College of Obstetricians and Gynecologists. You can find a full list of sources used for this article below. The content on this page should not replace professional medical advice. Always consult medical professionals for full diagnosis and treatment.
- American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth: Month to Month, 6th ed. (Washington, DC: American College of Obstetricians and Gynecologists, 2015).
- Kids Health. “Week 15.”
- Kids Health. “Week 19.”
- Mayo Clinic. “Edema.”
- Mayo Clinic. Guide to a Healthy Pregnancy, 2nd ed. (Rochester, MN: Mayo Clinic Press, 2018).
- Mayo Clinic. “Pregnancy Week by Week.”
- Mayo Clinic. “Varicose Veins.”










