Second trimester · 16 weeks to go
| Fact | Week 24 |
|---|---|
| Days of pregnancy | 162–168 since LMP |
| Gestational age span | 23w0d to 23w6d |
| Trimester | Second trimester (weeks 14–27) |
| Pregnancy month | Month 2 (weeks 5–8) |
| Average length | 11.8 in (crown to heel) |
| Average weight | 1.32 lb |
| Size comparison | an ear of corn |
| Weeks remaining | 16 (40-week due date) |
Week 24 is the viability milestone: babies born now can survive with intensive neonatal care, and survival odds climb steeply every week after. The lungs begin producing surfactant, the soap-like film that lets air sacs stay open.
The face is fully formed with eyelashes and brows. Taste buds are fully working, and the baby has a stable wake-sleep rhythm you may be mapping from kicks. Skin is still loose but filling.
Gestationally, week 24 means you are 23 weeks and 0 to 6 days pregnant, day 162 to day 168 counted from the first day of your last period. This is week 11 of the second trimester (weeks 14–27). Prenatal appointments run about every four weeks in this stretch. Week 28 brings the third trimester and the start of daily kick counts. 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 24.
Schedule the glucose screening test for the next month. Start a kick-counting habit: learn the baby's normal pattern.
Weeks of pregnancy don't map cleanly to calendar months, but the common division puts week 24 falls in month 2 of pregnancy (weeks 5–8). Week 24 is part of the second trimester, which runs from week 14 to week 27. Gestationally, week 24 means you are 23 weeks and 0 to 6 days pregnant.
At week 24 the baby averages 11.8 in long and weighs about 1.32 lb, roughly the size of an ear of corn. 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.