Week 40 of Pregnancy
The due date arrives. About 90% of births occur within ±2 weeks of the EDD; only ~5% land on the exact day.
Fetal size
Watermelon
- Length
- 51.2 cm
- Crown-to-heel
- Weight
- 3.46 kg
Fetal development
- All organs are fully prepared for birth.
- Average weight ~3.4kg, length ~51cm.
- Placental aging begins late in pregnancy and may require closer monitoring.
Maternal changes
- Birth ±2 weeks from the EDD is normal.
- After 41 weeks, your OB may discuss induction.
Recommended checkups
- Non-stress tests (NST) and amniotic fluid checks become more frequent after 40 weeks.
Jump to week
Textbook averages. Individual variation is wide and this is not medical advice — confirm with your OB.