It is not always dark in here

The fine hair covering your baby's skin, called lanugo, is gradually disappearing, while the fingernails and toenails are growing. The bone marrow has completely taken over blood-cell production from the liver. The baby is becoming aware of its surroundings. Although the uterus is often thought to be pitch dark, it can be light or dark depending on the mother's surroundings, and the baby can distinguish between them. In boys, the testes are completing their descent into the scrotum. The baby now weighs about two-thirds of its eventual birth weight.

During these weeks, you may be becoming tired of being pregnant. Difficulty sleeping and heartburn are common. You may occasionally feel pain or tightening in the groin. These are small, insignificant contractions that maintain uterine tone, known as Braxton Hicks contractions.

A baby born at 30 weeks