Pregnancy week 21
This week your baby is about the size of a carrot — around 26.7 cm and 360 g.
Your baby this week
Your baby is steadily gaining weight this week, and the digestive system is starting to absorb small amounts of sugar from the swallowed fluid. Movements are stronger and more organized, and you may feel them as gentle kicks or rolls throughout the day. Bone marrow is developing and beginning to make blood cells, while eyebrows and lashes continue to appear. Your baby is also settling into a rhythm of sleeping and waking.
Your body this week
You may feel more comfortable and energetic at this stage, though spider veins or varicose veins can appear on your legs due to the increased blood volume. Feeling hungrier is also common as your baby grows. You might notice some changes in your skin or hair as well.
Tips for this week
Put your feet up when sitting and avoid standing for long periods to improve circulation and ease varicose veins. Choose nourishing snacks like fruit and nuts to satisfy your growing appetite in a healthy way. And give yourself moments of rest and calm to simply enjoy your baby's movements.
Frequently asked questions
How big is the baby at week 21?+
At week 21, your baby is about the size of a carrot — roughly 26.7 cm and 360 g, though every baby grows at its own pace.
Which trimester is week 21?+
Week 21 falls in the Second trimester.
How many weeks are left at week 21?+
At week 21, you have about 19 weeks to go until the typical 40-week due date.
Is week 21 normal?+
Every pregnancy is different. If you feel well and your check-ups are on track, week 21 is usually a normal part of the journey — but always reach out to your doctor or midwife with any concern.
This guide is for general information and reassurance — it isn't medical advice. Always follow your doctor or midwife for your own pregnancy.