Final - Menses

Question 1

Days 1-5

Answer 1

• Menstrual Phase
• Superficial, functional layer of endometrial lining sloughing off from uterine wall
• Bleeding 3-5 days
• Average blood loss 50-150 ml (~.25 - .5 cup)
• By day 5, growing ovarian follicle producing more estrogen

Question 2

Days 6-14

Answer 2

• Proliferative Phase
• Functional layer regenerates
• Glands form from functional layer
• Endometrial blood increases, making it well vascularized again
• At the end of this phase, ovulation occurs, caused by release of LH into bloodstream

Question 3

Days 15-28 (constant)

Answer 3

• Secretory Phase
• Triggered by corpus luteum’s progesterone, endometrium blood level rises more
• Glands secrete nutrients into uterine cavity

Question 4

Days 15-28 (if pregnant)

Answer 4

• Everything in (constant)

- Embryo produces LH-like hormone that causes corpus luteum to continue producing its hormones

Question 5

Days 15-28 (not pregnant)

Answer 5

• Everything in (constant)
• Corpus luteum degenerates and blood levels decline
• Blood vessels supplying functional layers spasm and kink
• Spasms and kinking causes endometrial cells to die, setting up for Menstrual Phase