11. The Menstrual Cycle primary follicle Graafian follicle (secretes progesterone + oestrogen) (causes ovulation + formation of corpus luteum) (keeps the uterine lining thick and well supplied with blood, preparing it for implantation of the embryo + inhibits both FSH and LH production) Ostrogen causes the repair and growth of the uterine lining + stimulates the pituitary gland to secrete LH + high concentration of oestrogen in blood inhibits FSH production FSH stimulates development of follicles in ovaries + follicles in the ovary to secrete oestrogen oestrogen