Pregnancy Week 15: What to Expect
Baby's development, your body's changes, common symptoms, what to eat, and what to do this week.
Baby's development at week 15
Baby's bones continue hardening. Baby can now hear muffled sounds from outside the body — your heartbeat, voice, blood flow, and even loud noises like music or a dog barking. Baby practices breathing-like motions, taking in and releasing amniotic fluid (this is practice for lung development). Taste buds are forming. Baby has more defined ears now, in their final position. Baby's scalp pattern is set, even if hair has not grown yet.
What's happening in your body
The uterus is now palpable about halfway between the pubic bone and belly button. Your skin may show more pigmentation changes — linea nigra (line down the belly), melasma (darker patches on cheeks, forehead, upper lip) more visible if you spend time in the sun. Round ligament pain becomes more common as the uterus expands. Some people start to feel quickening — the first faint baby movements, often described as "bubbles" or "gas" or "flutters."
Common symptoms at week 15
Increased pigmentation (linea nigra, melasma). Round ligament pain. Possible first signs of quickening, especially in second or later pregnancies. Increased appetite. Bump definitely visible. Less nausea. Possible mild constipation, heartburn, or back ache. Hair feels lush; some experience unwanted hair growth (on face, belly) that resolves postpartum.
When to call your provider
Severe sudden headache, vision changes, or sudden swelling in face/hands. Severe abdominal pain or heavy bleeding. Decreased fetal movement is not yet a concern at week 15 because you may not have felt any yet.
How to feel better this week
Wear sunscreen daily to limit melasma. Talk to baby — they can hear you now, and there is evidence newborns recognize voices they heard in utero. Play music if you want. Sleep on your side; if back-sleeping happens, do not panic, but try to roll over when you notice. Keep moving daily.
Nutrition focus for week 15
Keep eating the rainbow. Add foods rich in vitamin K (leafy greens) and zinc (pumpkin seeds, oysters, beef) which support baby's growing organs and immune system. Avoid raw fish, deli meats, soft cheeses, and high-mercury fish. Limit caffeine to under 200 mg.
For your partner
Read to or talk to the bump out loud. There is decent evidence newborns recognize voices and sounds (lullabies, your partner's voice, the family dog's bark) from in utero. Bonding can start now.
This week's to-do
Start using sunscreen daily. Read to the bump.
Is this normal?
Stretch marks (striae gravidarum) are mostly genetics. Lotion, butter, oil — they feel good but they do not prevent stretch marks. If you get them, they fade from purple to silvery over months postpartum.
Use the Pregnancy Due Date Calculator
Confirm exactly which week you're in or recalculate based on a known conception or ultrasound date.
Open the calculator →Other pregnancy safety lookups
Or visit the Pregnancy Safety Guide to search across all 460+ lookups.