15 Weeks Pregnant
At 15 weeks pregnant, your baby is about the size of a lemon.
- Length
- 8.7 cm (3.4 in)
- Weight
- 43 g (1.5 oz)
- Trimester
- Second
- Month
- Month 4
- Weeks to go
- 25
Size of a lemon
Your baby at 15 weeks
Your baby is still about the size of a lemon. They are practicing breathing movements with amniotic fluid, and their skeleton is turning from cartilage into bone. They may already sense light through their eyelids.
Your body at 15 weeks
Your bump is growing, and so is your blood volume, which can cause nosebleeds and a stuffy nose. You might notice a dark line (linea nigra) on your belly.
Common symptoms at 15 weeks pregnant
- Stuffy nose or nosebleeds
- Darkening skin
- Heartburn
- Occasional headaches
Every pregnancy is different. Having none of these symptoms is normal too.
Tips for week 15
- The quad screen blood test can be done between 15 and 22 weeks.
- Use a saline spray or humidifier for congestion.
- Wear sunscreen to reduce pregnancy skin darkening (melasma).
Your week 15 checklist
- Ask about the quad screen (15 to 22 weeks)
- Wear sunscreen daily
- Try a saline spray for congestion
Helpful at 15 weeks
15 Weeks Pregnant: your questions answered
How big is a baby at 15 weeks pregnant?
At 15 weeks your baby is about the size of a lemon: around 8.7 cm (3.4 in) long and weighing about 43 g (1.5 oz). Every baby grows at their own pace.
How many months is 15 weeks pregnant?
15 weeks pregnant is month 4 of your pregnancy, in the second trimester. Your due date is 25 weeks away.
Can I feel my baby move at 15 weeks?
It is possible, especially if you have been pregnant before, but most first-time parents feel the first flutters between 18 and 22 weeks.
Sources
This guide is written from public guidance by the American College of Obstetricians and Gynecologists (ACOG), the NHS, the CDC and the World Health Organization. Baby sizes are averages; your baby may be bigger or smaller and still perfectly healthy.
General information only, not medical advice.
History of updates
- : Added a weekly checklist and common questions.
- : Matched fruit, length and weight to the Prego app.
- : Published.