THE MENSTRUAL CYCLE Big Q What are the

THE MENSTRUAL CYCLE Big Q: What are the main functions of the female reproductive system?

ENGAGE - FIRST CYCLE ➤ Based on the video, write down the steps of the menstrual cycle and a brief description of each.

EXPLORE - HORMONES ➤ Answer the questions on your worksheet

LH Menstrual cycle Controlled by interaction of egg development 4 hormones: ◆ ◆ ◆ FSH & LH estrogen progesterone FSH ovulation = egg release corpus luteum estrogen progesterone lining of uterus Regents Biology days 0 7 14 21 28

Female hormones FSH & LH ■ ◆ ◆ ◆ released from pituitary stimulates egg development & hormone release peak release = release of egg (ovulation) Regents Biology

▪ Estrogen ▪ released from ovary cells around developing egg ▪ stimulates growth of lining of uterus ▪ decreasing levels causes menstruation ▪ Progesterone ▪ stimulates blood supply to lining of uterus ▪ decreasing levels causes menstruation Regents Biology

ELABORATE - STEPS OF THE CYCLE ➤ Follicular Phase - FSH and Estrogen increase to create a follicle around the egg ➤ Ovulation - LH and FSH increases to ease the release of the egg ➤ Luteal Phase - progesterone surges to create a corpus luteum, which if pregnant, will supply the uterus with progesterone ➤ Menstruation - All hormones decrease and the uterus sheds

Egg maturation in ovary releases progesterone maintains uterus lining Regents Biology produces estrogen

Fertilization Regents Biology

EVALUATE - EXIT TICKET ➤ Complete the task card