


Week 21 of Pregnancy
Your baby is the size of a baking potato
10.8 in • 14.1 oz
Baby Development
Your baby is now completely covered with a fine, downy hair called lanugo. This hair helps hold the vernix caseosa on the skin. The sucking reflex is also developing, so your baby may be able to suck a thumb.
Your Body This Week
You may be feeling more of your baby's movements now, and they may be getting stronger. You may also be experiencing some swelling in your hands, feet, and ankles. This is normal, but if you have sudden or severe swelling, you should contact your healthcare provider.
Milestones This Week
Anatomy scan
The anatomy scan is the most detailed ultrasound of the pregnancy. It evaluates baby's development and can reveal the sex, if you wish.
Learn More
As you progress into Week 21 of your pregnancy, it's a time to focus on maintaining well-being amidst significant physiological adaptations. Your body is now fully in the swing of supporting your baby's development. Hormonal shifts, particularly the increased levels of progesterone and estrogen, help nurture pregnancy but may also come with heightened sense of fatigue or mood changes. You might notice metabolism shifts—your body is becoming more adept at storing energy to ensure your growing baby has all the nutrients they need. While weight gain during this period can mainly be attributed to maternal adaptations, your baby will start contributing significantly as well over the coming weeks. It’s crucial to continue prioritizing a nutrient-dense diet, filled with fruits, vegetables, lean proteins, and whole grains, to support these changes. Staying active with moderate-intensity exercises like walking or prenatal yoga, if cleared by your healthcare provider, will help manage weight, boost energy, and alleviate some discomforts. Listening to your body is key; rest when needed and avoid overexertion. As always, adhere to prenatal vitamin routines to ensure sufficient nutrient intake, and keep communicating with your healthcare provider for personalized guidance.
Frequently Asked Questions
How big is my baby at 21 weeks pregnant?
At week 21 of pregnancy, your baby is about the size of a baking potato, measuring approximately 10.8 in and weighing around 14.1 oz.
What trimester is week 21 of pregnancy?
Week 21 is in the second trimester of pregnancy. The first trimester covers weeks 1-13, the second trimester covers weeks 14-26, and the third trimester covers weeks 27-40.
What is happening with my baby at week 21?
Your baby is now completely covered with a fine, downy hair called lanugo.
What symptoms can I expect at week 21 of pregnancy?
You may be feeling more of your baby's movements now, and they may be getting stronger.
