Your baby this week
Your baby is getting really good at kicking and punching — you're probably feeling more now! The digestive system is maturing, and your baby is practicing swallowing amniotic fluid. The bone marrow is making blood cells on its own now. And here's something fun — your baby has developed taste buds! When you eat something flavorful, your baby can actually taste it through the amniotic fluid, so keep eating the good stuff.
Your body this week
Braxton Hicks contractions may begin — these are 'practice' contractions that feel like a tightening across your belly. They're irregular, painless, and totally normal. Stretch marks may become more visible. Varicose veins can appear. You might feel more comfortable and energetic than you did in trimester one — enjoy the golden period while it lasts.
Common symptoms this week
Every pregnancy is different — you may notice some of these, all of them, or none at all. None of this is a checklist to worry over.
- Braxton Hicks practice tightening
- More visible stretch marks
- Varicose veins
- Steadier energy and comfort
This week’s checklist
- Learn the difference between Braxton Hicks and real contractions
- Elevate your feet regularly and get gentle leg massages to help with varicose veins
- Start thinking about your birth plan preferences
- Eat iron-rich foods — your body needs more as blood volume rises. A dietitian can help with a plan suited to your diet.
- Walk at least 30 minutes daily if comfortable
What’s normal this week
Most of what you’re feeling is your body doing exactly what it should — the everyday symptoms don’t need a call. The signs below are the rare exceptions: noticing one doesn’t mean something’s wrong, just that it’s worth a quick check.
When to call your doctor
- Contractions that are regular, painful, or increasing
- Vaginal bleeding or unusual discharge
- Severe swelling in one leg only (could indicate DVT)
This guide offers general information for a typical pregnancy and is not a substitute for personalised medical advice. Always follow your doctor or midwife’s guidance for your situation.
Frequently asked questions
How big is my baby at 21 weeks pregnant?
At 21 weeks pregnant, your baby is about the size of a carrot.
What are common symptoms at 21 weeks pregnant?
Common symptoms around 21 weeks pregnant include braxton Hicks practice tightening, more visible stretch marks, varicose veins, steadier energy and comfort. Every pregnancy is different — you may notice some of these, all of them, or none at all.
What is developing at 21 weeks pregnant?
Your baby is getting really good at kicking and punching — you're probably feeling more now! The digestive system is maturing, and your baby is practicing swallowing amniotic fluid.
When should I call my doctor at 21 weeks pregnant?
Call your doctor at 21 weeks if you notice contractions that are regular, painful, or increasing; vaginal bleeding or unusual discharge; severe swelling in one leg only (could indicate DVT).
Last updated June 2026
References
Ovyacare’s guidance is written in-house and aligned with leading medical authorities: