During puberty, waves of estrogen and progesterone regulate primary sex characteristics, like monthly changes to the ovary stroma to promote egg maturation and ovulation, and changes to the uterine wall lining as part of the menstrual cycle.

在青春期，雌激素和孕酮水平的波动会调节第一性征，如每月卵巢基质的变化促进了卵子成熟和排卵，以及作为月经周期一部分的子宫内膜的变化。