Third trimester: weeks 28–42
The third trimester on Cloverlatch — every week page, in order.
- Week 28The third trimester begins. Eyelashes have formed, the eyes can …
- Week 29Muscles and lungs keep maturing, and the head is growing to make…
- Week 30The brain is developing grooves and wrinkles as it grows, and th…
- Week 31The fetus can turn its head, process information, and track ligh…
- Week 32Toenails and fingernails are fully formed, and the fetus practic…
- Week 33The skull bones are still flexible and not yet fused, which help…
- Week 34The central nervous system and lungs continue to mature, and the…
- Week 35Kidneys are fully developed, the liver can process some waste pr…
- Week 36The fetus is gaining weight steadily and shedding most of the do…
- Week 37Early term. The fetus practices grasping, turns toward light, an…
- Week 38The fetus has a firm grasp and continues gaining — building the …
- Week 39Full term. The brain continues developing at a rapid pace, and t…
- Week 40The due date arrives — an estimate, not a deadline. Only a small…
- Week 41Late term. Providers typically increase monitoring and discuss t…
- Week 42Post-term by definition at 42 completed weeks. Most providers re…
Educational information only — not medical advice. Every pregnancy and every baby develops on their own timeline. If you have any concern, talk to your obstetric provider or your baby's pediatrician.