15 Weeks Pregnant
You’re 15 weeks pregnant — in the second trimester, and 25 weeks to go until your due date. Your baby is about the size of a apple this week.
How big is your baby at 15 weeks?
Size of a
apple
Length
~10.1 cm
Weight
~70 g
Last week your baby was about the size of a peach; this week it's grown to roughly a apple.
Sizes are averages from standard fetal-growth references. Every baby grows at its own pace — your provider tracks yours at scans.
Baby development at week 15
The fetus is now sensing light, even though the eyelids are still fused shut — a bright torch on your belly may prompt movement away from it. Taste buds are forming, and the legs are growing longer than the arms. The bones are getting harder and will start showing up on scans. About the size of an apple.
Your body at 15 weeks
Common symptoms many people notice around week 15 include:
- Increased appetite
- Possible nosebleeds and congestion from extra blood flow
- Mild swelling in the gums
- Round-ligament aches
Symptoms vary enormously from person to person and pregnancy to pregnancy. Not having a symptom on this list is just as normal as having it.
Tips for week 15
- Eat iron-rich foods to support the growing blood supply
- Use a humidifier if congestion bothers you at night
- Keep up regular dental care — pregnancy can affect gums
What trimester is 15 weeks?
Week 15 falls in the second trimester. As a quick map: the first trimester runs weeks 1–13, the second covers weeks 14–27, and the third is week 28 through birth (a due date is set at 40 weeks). Want your own dates? Our Pregnancy Due Date Calculator shows your due date and exactly how far along you are today.
The second trimester (weeks 14–27) is the stretch many people find most comfortable: early nausea usually fades, energy returns, and the bump becomes visible. The big checkpoint is the mid-pregnancy anatomy scan around week 20, and you'll likely feel the first movements during these weeks.
Frequently asked questions
- How many months is 15 weeks pregnant?
- 15 weeks pregnant is about 4 months. Pregnancy months don't divide evenly into 4-week blocks, so week-to-month conversions are approximate — most providers track pregnancy by week, not month.
- How big is the baby at 15 weeks?
- At 15 weeks, the baby is about the size of a apple, roughly 10.1 cm and around 70 g. These are averages — healthy babies vary, and your provider tracks your baby's own growth curve at scans.
- What trimester is 15 weeks?
- Week 15 is in the second trimester. The first trimester is weeks 1–13, the second is weeks 14–27, and the third is weeks 28 to birth (around week 40).