21 weeks pregnant: the key facts
| Trimester | Second trimester |
|---|---|
| Month of pregnancy | Month 5 (approximately) |
| Week of pregnancy | Week 22 (21 weeks completed) |
| Weeks to the due date | 19 weeks |
| Days since conception (approx.) | 133 days |
| Baby’s size (rough comparison) | About the size of a carrot |
What typically happens at 21 weeks
Movements are becoming stronger and more regular.
The second trimester is often the most comfortable stretch. Energy usually improves, the bump becomes more noticeable and movements become easier to feel as the weeks go by. At 21 weeks there are about 7 weeks until the third trimester starts at 28 weeks.
Every pregnancy is different, and the timing of tests and appointments depends on your healthcare provider and country. If something worries you — for example bleeding, severe pain, fluid leaking or, later in pregnancy, a change in your baby’s movements — contact your midwife, doctor or maternity unit straight away.
21 weeks pregnant in days and months
21 weeks is 147 days of pregnancy, counted from the first day of the last period, which is 53% of the way through a 40-week pregnancy. In months, 21 weeks is roughly 4.8 calendar months — usually described as month 5 of pregnancy. Because the baby’s age is counted from conception, it is about two weeks younger than the pregnancy: roughly 19 weeks of fetal age.
Your dates if you are 21 weeks pregnant today
Being 21 weeks pregnant today means the first day of your last period was around and conception most likely happened around . Your estimated due date is , and you will reach full term (39 weeks) around . For dates based on your actual period, use the calculator above or the main Due Date Calculator.
Other weeks
19 weeks pregnant · 20 weeks pregnant · 22 weeks pregnant · 23 weeks pregnant · full pregnancy timeline