15 Weeks Pregnant
Summary
Size
apple
Length
10.1 cm
Weight
70 g
Until due date
25 weeks
15 / 40 week
%38
What's Happening With Your Baby
The baby can sense light and may move away from a strong light held against your belly. Bones continue to harden. The legs are now longer than the arms. Sucking movements have begun.
What's Changing For You
A blocked nose and bleeding gums are common as blood flow to your mucous membranes increases. Back pain may start.
To Do This Week
The quad screen falls between weeks 16 and 18 — arrange your appointment.
Switch to a soft toothbrush and be gentle with floss.
Watch your posture for back pain and avoid standing for long stretches.
Frequently Asked Questions
How many months is 15 weeks pregnant?
Week 15 of pregnancy falls in month 4 and in the second trimester. Pregnancy months don't run in neat four-week blocks, so the week-to-month conversion rarely lands on a whole number — which is why pregnancy is tracked in weeks.
How big is the baby at 15 weeks?
At 15 weeks your baby is roughly the size of a apple: around 10.1 cm long and 70 grams. These are averages; clear variation between babies is normal, and what matters is the growth curve your doctor is tracking.
How long is left at 15 weeks pregnant?
Assuming a 40-week pregnancy, you have around 25 weeks left at week 15. Most births happen between weeks 37 and 42, so a due date is a range rather than a fixed day.
What should I watch out for at 15 weeks?
The quad screen falls between weeks 16 and 18 — arrange your appointment. Switch to a soft toothbrush and be gentle with floss. Watch your posture for back pain and avoid standing for long stretches.
Track your pregnancy week by week
Baby Wallie brings your baby's weekly development, your health logs and AI-powered nutrition, sleep and breathing programs into one app. Free for 7 days.
Related Guides
When To Seek Care Immediately
Whatever week you are in, contact your doctor or the nearest health facility without waiting if you have: vaginal bleeding or fluid loss, severe persistent abdominal pain, a severe headache, blurred vision or flashing lights, sudden swelling of the hands or face, a fever above 38 °C, burning on urination with fever, persistent vomiting, fainting, or — after week 28 — a clear reduction in your baby's movements. In these situations reach real medical care rather than an app or a web search.
This content is for informational purposes only and does not replace medical advice. Always consult your doctor or midwife about your own or your baby's health.