By the thirty-third week the belly should be close to the size of a basketball. The waistline is still growing as one gain up to one pound per week. Insomnia is very common at this point. Back pain, leg pain, and foot pain are likely ever-present. Gaining of the weight remains constant at this week.

The bones in the baby’s skull aren’t fused together, which allows them to move and slightly overlap, making it easier for them to fit through the birth canal. These bones don’t entirely fuse until early adulthood, so they can grow as the brain and other tissue expands during infancy and childhood. The skin starts smoothening and lots of movements inside womb are observed. The baby is about the size of a pineapple, length is 17 ¼ inches and weighs 4 ⅓ pounds.

Trouble sleeping, wrist pain are the symptoms seen in this week.