Week 21
Trimester 2Days 20+0 to 20+6
Baby is now the size of a large carrot
Welcome to Week 21. You are now just over halfway through your pregnancy, and your baby is growing bigger, stronger, and more active every day. Baby movements become more noticeable and pregnancy often feels more established. Your baby is continuing to develop important body systems while practicing skills that will be needed after birth. This is often a time when excitement begins to outweigh uncertainty.
Length
~18 cm
~7.1 in
Weight
350–400 g
771.6 lb–881.8 lb
Development highlights
- check_circleYour baby is very active — kicking, stretching, rolling, twisting, pushing against the uterine wall, and grabbing the umbilical cord.
- check_circleTiny eyebrows are forming and the eyelids remain closed while the eyes continue developing underneath.
- check_circleYour baby continues swallowing amniotic fluid to develop the digestive system and prepare the intestines for life after birth.
- check_circleBone marrow is beginning to contribute to blood cell production — a job previously handled mostly by the liver and spleen.
- check_circleHearing is becoming more advanced and your baby may now detect your voice, music, and everyday household sounds.
This week's milestones
- check_circleBone marrow beginning blood cell production.
- check_circleEyebrows forming.
- check_circleHearing increasingly advanced.
- check_circleDigestive system practicing regularly.
Fun fact
Your baby may already have a favorite sleeping position inside the uterus.
Weekly checklist
- Continue prenatal vitamins.
- Stay hydrated.
- Eat balanced meals.
- Stay active.
- Monitor upcoming appointments.
- Enjoy spending time connecting with your baby.
Frequently asked questions
Should I feel the baby every day now?
Most mothers are feeling movements regularly by this stage, although patterns are not yet as consistent as they will be later.
Is heartburn normal?
Yes. Heartburn becomes increasingly common as pregnancy progresses, due to hormonal changes and the growing uterus.
Can my baby hear music?
Your baby can hear some sounds, although they are softened and muffled inside the womb.
Is it normal to feel emotional about my changing body?
Absolutely. Pregnancy brings major physical and emotional changes. Both loving and struggling with those changes are completely normal.
Related tools
shopping_bagHelpful picks for Trimester 2
Browse all pregnancy products →Momcozy Maternity Pregnancy Pillow
Full-length maternity pillow for bump support and back relief — great from the second trimester onward.
Kindred Bravely Maternity Compression Socks
Graduated compression socks to reduce swelling and relieve tired legs — great from the 2nd trimester onward.
Palmer's Cocoa Butter Stretch Mark Lotion
A trusted daily moisturizer for stretch mark prevention during pregnancy with vitamin E and collagen.
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Medical information disclaimer
The content on this page is provided for general informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment.
Always consult your GP, midwife, health visitor, paediatrician, or other qualified healthcare provider before making decisions about your health or your child's health and development. Never ignore or delay seeking professional advice because of something you have read on BabyScout. If you think there is a medical emergency, call 999 (UK) or your local emergency services immediately.