After ovulation the ruptured follicle becomes the corpus luteum, which mainly secretes

Explanation

Progesterone from the corpus luteum maintains the thickened endometrium and inhibits FSH and LH so that no further follicle ripens. FSH and LH are pituitary hormones acting on the ovary rather than products of it, which is the trap here. If no implantation occurs the corpus luteum degenerates after about ten days and progesterone falls, which brings on menstruation.