What Happens During Pregnancy Weeks 13 to 18?

Second Trimester pt1 At 13-18 weeks [11-16 weeks after conception], all the baby's nerves, organs, and muscles are functioning. The immune system, sex organs, and respiration are developing. The skin is forming distinct layers and the baby is developing fat stores; its ears stick out of its head.

Did you know?
A large majority of women get stretch marks. If you’re carrying multiples, a big baby or have an excess of amniotic fluid, your chances of stretch marks are higher. Creams and oils may help reduce stretch marks. Be careful not too gain too much weight too rapidly.