21 Weeks Pregnant
Summary
Size
carrot
Length
26.7 cm
Weight
360 g
Until due date
19 weeks
21 / 40 week
%53
What's Happening With Your Baby
The baby is swallowing amniotic fluid, giving the digestive system practice. Taste buds have developed — the flavours of what you eat pass into the amniotic fluid. Arm and leg movements are becoming coordinated.
What's Changing For You
Kicks can now be felt from the outside. The risk of varicose veins and haemorrhoids rises. Itchy skin is common.
To Do This Week
Put your partner's hand on your belly so they can feel the kicks too.
Don't stand for long periods, and wear compression stockings if they're recommended.
Try a range of flavours; your baby's palate is taking shape in this period.
Frequently Asked Questions
How many months is 21 weeks pregnant?
Week 21 of pregnancy falls in month 5 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 21 weeks?
At 21 weeks your baby is roughly the size of a carrot: around 26.7 cm long and 360 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 21 weeks pregnant?
Assuming a 40-week pregnancy, you have around 19 weeks left at week 21. 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 21 weeks?
Put your partner's hand on your belly so they can feel the kicks too. Don't stand for long periods, and wear compression stockings if they're recommended. Try a range of flavours; your baby's palate is taking shape in this period.
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.