Second trimester · 18 weeks to go
| Fact | Week 22 |
|---|---|
| Days of pregnancy | 148–154 since LMP |
| Gestational age span | 21w0d to 21w6d |
| Trimester | Second trimester (weeks 14–27) |
| Pregnancy month | Month 2 (weeks 5–8) |
| Average length | 10.9 in (crown to heel) |
| Average weight | 15.2 oz |
| Size comparison | a spaghetti squash |
| Weeks remaining | 18 (40-week due date) |
Week 22 sharpens the senses: grip strength improves, hearing is acute enough that loud sounds may startle the baby, and the inner ear's balance system finishes forming. Lips, eyelids, and eyebrows are increasingly distinct.
Tooth enamel forms on the buds under the gums. The pancreas, crucial for hormone production, is developing steadily. The baby is around a pound now, though still had a full pound of growing to do per month ahead.
Gestationally, week 22 means you are 21 weeks and 0 to 6 days pregnant, day 148 to day 154 counted from the first day of your last period. This is week 9 of the second trimester (weeks 14–27). Prenatal appointments run about every four weeks in this stretch. Week 24 brings viability and the opening of the glucose-test window (weeks 24–28). Across this trimester the baby more than triples in weight, so expect your bump, your appetite, and eventually your waddle to keep pace with the calendar. Every number on this page is an average across pregnancies; your own scan dates and your baby's measurements are what actually describe your week 22.
Practice pelvic-floor exercises daily now to reduce third-trimester leaks. A support belt can offload the back.
Weeks of pregnancy don't map cleanly to calendar months, but the common division puts week 22 falls in month 2 of pregnancy (weeks 5–8). Week 22 is part of the second trimester, which runs from week 14 to week 27. Gestationally, week 22 means you are 21 weeks and 0 to 6 days pregnant.
At week 22 the baby averages 10.9 in long and weighs about 15.2 oz, roughly the size of a spaghetti squash. Sizes come from fetal growth charts (crown-to-heel length from week 20), and normal variation week to week is wide; your ultrasound measurements always outrank a chart.