Physical Changes During the 2nd Trimester

• Uterus continues to grow, eventually reaching several inches above mother's belly button. Changed uterus position now results in pressure on the intestines.
• Musculature at the top of the stomach relaxes, which may result in indigestion.
• Hormones which affect skin pigmentation increase. Linea Negra (a dark line from mom's belly button to pubic area) may develop as a result of hormones. Linea Negra usually fades after delivery. Nipples may become darker. A small percentage of women even experience discoloration of the face.
• Quickening (feeling baby moving within the uterus) occurs sometime between week 18 and week 20 in first time moms; as early as 16 for veteran moms.
• Connective tissue in the skin may break down causing stretch marks on the abdomen, thighs or breasts.
• Blood volume increases by as much as 50%.
• Weight gain of between 13 and 15 pounds is expected by the end of the second trimester.
• Water retention which results in swelling of the extremities.