Week 21
Your baby is the size of a Carrot
Baby Size
Carrot
Length
6.9 in (17.5 cm)
Weight
12.7 oz (360 g)
Trimester
Second Trimester
Your Baby at Week 21
Your baby is the size of a carrot at 21 weeks. The digestive system is practicing, and white blood cells are forming to fight infections after birth.
Key milestone: The baby swallows more and their digestive system practices working. White blood cells form.
Your Symptoms
Kicks are unmistakable. Leg swelling begins. Stretch marks may appear.
Tip for This Week
Stay active with walking or prenatal yoga — it helps with circulation and prepares your body for birth.
Your Body at Week 21
The second trimester brings a welcome shift — your energy returns as hormone levels stabilize. Your uterus is now rising above the pubic bone, and your baby bump is becoming noticeable. Increased blood flow may give you that 'pregnancy glow,' but it can also cause nasal congestion and gum sensitivity.
Your baby at week 21 is the size of a Carrot, measuring about 6.9 in (17.5 cm) and weighing roughly 12.7 oz (360 g). Your baby is becoming more active, and you may notice patterns in their movements — especially after meals or when you're resting.
Your Baby's Development This Week
Your baby is the size of a carrot at 21 weeks. The digestive system is practicing, and white blood cells are forming to fight infections after birth. The key milestone this week is that the baby swallows more and their digestive system practices working. white blood cells form.
The second trimester is when pregnancy becomes more tangible. Your baby's movements grow from subtle flutters to definite kicks, and their senses are awakening to the world outside. This is a beautiful time to begin bonding practices like daily voice notes.
This week's voice theme
“Growing stronger every day — getting ready for the big debut.”
Imagine hearing this every morning — a voice note from your baby that evolves week by week.
Hear your baby's voice →Frequently Asked Questions
When should I start preparing for maternity leave?
Start planning around 20-24 weeks. Discuss with your employer and understand your benefits.
Is swelling normal at 21 weeks?
Mild swelling (edema) is normal. Severe or sudden swelling should be reported to your provider.