12 Weeks Pregnant
Summary
Size
lime
Length
5.4 cm
Weight
14 g
Until due date
28 weeks
12 / 40 week
%30
What's Happening With Your Baby
Reflexes are developing: fingers open and close, toes curl. The intestines are moving into the abdominal cavity. Facial features have become distinct and the eyes have shifted forward. The genitals have begun to differentiate, though it is still too early to tell on ultrasound.
What's Changing For You
The first trimester is ending. The risk of miscarriage drops markedly after this week. Your energy may start to return.
To Do This Week
If you had your combined screening this week, go through the results in detail with your doctor.
Many people wait until this week to share the news — the decision is yours.
A good time to start regular walking and Kegel exercises.
Frequently Asked Questions
How many months is 12 weeks pregnant?
Week 12 of pregnancy falls in month 3 and in the first 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 12 weeks?
At 12 weeks your baby is roughly the size of a lime: around 5.4 cm long and 14 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 12 weeks pregnant?
Assuming a 40-week pregnancy, you have around 28 weeks left at week 12. 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 12 weeks?
If you had your combined screening this week, go through the results in detail with your doctor. Many people wait until this week to share the news — the decision is yours. A good time to start regular walking and Kegel exercises.
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.