endocrine physiology of contraceptives

Question 1

oral contraceptives

Answer 1

-high levels of estrogen and progesterone -> stops GnRH secretion = low FSH / LH
-mimics luteal phase = no follicle maturation, no ovulation

Question 2

implantation

Answer 2

similar to oral contraceptives but release progestin to prevent ovulation

Question 3

morning after pill

Answer 3

-high estrogen and progestin or progestin only
-prevents implantation, ovulation, or fertilization