Menstrual cycle

Menstrual cycle phases (2)

Follicular phase (Menstrual and proliferative phase)

Luteal phase (Secretory phase)

Menstrual phase

Days

What happens to LH and FSH?

Estrogen?

Progesterone?

Follicle?

Days - 1-5

What happens to LH and FSH? increase

Estrogen? down

Progesterone? down

Follicle? 25 begin to mature

Proliferative phase

Days

Progesterone?

Follicle?

Endometrium?

Days - 6-14

Progesterone? low

Follicle? follicular growth

Endometrium? Proliferation

What does FHS and LH do in the proliferative phase?

FSH causes follicular development

LH causes production of androgens

Beginning proliferative phase
What happens to LH and FSH?

Estrogen?

What happens to LH and FSH? Lower (negative feedback from estrogen)

Estrogen? Lower

End of proliferative phase

What happens to LH and FSH?

Estrogen?

What happens to LH and FSH? Surge (Positive feedback from estrogen)

Estrogen? Higher

Ovulation (Before and after) and day

Day 14

Before - Granulosa cells secrete lots of estrogen

After - Corpus luteal cells secrete lots of progesterone (Some estrogen)

(General) Secretory phase

Days

What happens to LH and FSH?

Estrogen?

Progesterone?

Follicle?

Endometrium?

Days - 14-28

What happens to LH and FSH? Low (Negative feedback form hormones)

Estrogen? Some estrogen

Progesterone? High progesterone

Follicle? Corpus luteal

Endometrium? Proliferation and increased secretions

Secretory phase No pregnancy

Days

Estrogen?

Progesterone?

Follicle?

Days 25-26

Estrogen? Decreased

Progesterone? Decreased

Follicle? Corpus luteum atrophies and become corpus albicans