Which structure is stimulated by luteinizing hormone (LH) and secretes estrogen and progesterone?

The structure that is stimulated by luteinizing hormone (LH) and secretes estrogen and progesterone is the corpus luteum. After ovulation, when the follicle releases an egg, the remnants of the follicle transform into the corpus luteum. This structure plays a crucial role in the menstrual cycle and early pregnancy by producing the hormones estrogen and progesterone, which are vital for preparing the uterine lining for potential implantation of a fertilized egg. The increase in these hormone levels helps maintain the pregnancy if it occurs and also regulates various aspects of the menstrual cycle.

While the ovary contains the follicles and the corpus luteum, the specific structure responsible for the secretion of estrogen and progesterone after ovulation is the corpus luteum itself, making it the correct choice in this context. Other structures mentioned, like the follicle and oocyte, are involved in different stages of reproductive processes and do not directly secrete these hormones once ovulation has occurred.