Week 33 of Pregnancy
Maternal antibodies begin transferring across the placenta.
Fetal size
Pineapple
- Length
- 43.7 cm
- Crown-to-heel
- Weight
- 1.92 kg
Fetal development
- Maternal IgG antibodies cross the placenta, building passive immunity.
- The skull is firm but stays flexible for delivery.
- Lung development is nearly complete.
Maternal changes
- Pelvic pressure intensifies.
- Sleep is broken and shallow.
Recommended checkups
- Group B Strep (GBS) screening is scheduled around week 36 — confirm timing.
Jump to week
Textbook averages. Individual variation is wide and this is not medical advice — confirm with your OB.