16 Weeks Pregnant
Summary
Size
avocado
Length
11.6 cm
Weight
100 g
Until due date
24 weeks
16 / 40 week
%40
What's Happening With Your Baby
The baby is beginning to hear — especially your voice and your heartbeat. Eye movements have started. A hair pattern is forming on the scalp. The legs are fully developed.
What's Changing For You
Some women feel the first movements from this week onwards, particularly in a second pregnancy. It feels like a butterfly wing or a bubble of gas.
To Do This Week
Start talking to your baby; recognition of your voice begins in these weeks.
You can have the quad screening test this week.
Start moisturising the skin on your belly — it eases itching.
This Week's Checkup
The quad screening test is done between weeks 16 and 18.
Frequently Asked Questions
How many months is 16 weeks pregnant?
Week 16 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 16 weeks?
At 16 weeks your baby is roughly the size of a avocado: around 11.6 cm long and 100 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 16 weeks pregnant?
Assuming a 40-week pregnancy, you have around 24 weeks left at week 16. 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 16 weeks?
Start talking to your baby; recognition of your voice begins in these weeks. You can have the quad screening test this week. Start moisturising the skin on your belly — it eases itching.
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.