Pregnancy week by week / Week 15
15 weeks pregnant
That’s 4 months — the second trimester, with 25 weeks to go.
Baby size at 15 weeks
Your baby is about 10 cm (3.9 in) long and weighs about 0.07 kg (2 oz) — roughly the size of an apple.
What’s happening at 15 weeks
The baby is forming taste buds and can sense light. Bones are getting harder and the legs are growing longer than the arms.
Common symptoms at 15 weeks pregnant
- •More energy
- •Nosebleeds and congestion
- •Leg cramps
- •Heartburn
- •Sensitive gums
Every pregnancy is different — you may have all, some or none of these. Contact your doctor or midwife about anything that concerns you.
Count down to your due date
If you’re 15 weeks pregnant today, your due date is around Tuesday, December 8, 2026. Adjust the date below and create a free countdown to share.
First day of your last menstrual period (how doctors date a pregnancy)
⚕️ This is an estimate based on Naegele’s rule (40 weeks from your last period). Only about 1 in 20 babies arrive on the exact due date. Always confirm with your doctor or midwife.
FAQ
How many months is 15 weeks pregnant?
15 weeks pregnant is about 4 months, in the second trimester.
How big is the baby at 15 weeks?
At 15 weeks the baby is about 10 cm (3.9 in) long and weighs about 0.07 kg (2 oz) — roughly the size of an apple.
What are the symptoms at 15 weeks pregnant?
Common symptoms around 15 weeks include more energy, nosebleeds and congestion, leg cramps, heartburn. Symptoms vary a lot from person to person — contact your provider if anything worries you.
When is my due date if I am 15 weeks pregnant?
If you are exactly 15 weeks pregnant today, your estimated due date is around Tuesday, December 8, 2026 — 25 weeks from now. Use the calculator below with your real last-period date for a personalised estimate.
See every stage on the pregnancy week-by-week guide or open the full due date calculator.