? gamete a reproductive cell, sperm in the male and ova (eggs) in the female ??? ??? ??? gestational diabetes a form of diabetes mellitus that occurs during some pregnancies ??? ??? ??? gigantism abnormal overgrowth of the entire body that is caused by excessive secretion o fthe growth hormone before puberty ??? ??? ??? glucagon (GCG) increases the level of glucose in the bloodstreasm ??? ??? ???