Reproductive Flashcards
Estrogens include
estradiol
estrone
ethinyl estradiol
SERMs include
Clomiphene
ospemifene
raloxifene
tamoxifen
toremifene
Anti- progestin
mifepristone
Progesterone agonist/ antagonist
ulipristal acetate
Physiology of menstrual cycle
hypothalamus - gonadotropin releasing hormone is secreted
Anterior pituitary - GnRH stimulates FSH and LH by the anterior pituitary
FSH and LH downregulates the release of GnRH from the hypothalamus
Days of menstrual cycle
days 1-5 - menstruation
days 6-14 - follicular phase (estrogen driven)
day 14 - ovulation (LH driven)
days 15-28 - luteal phase (progesterone driven)
MOA of estrogens
agonist to the estrogen receptor
Use of estrogens
oral contraceptive
menopausal hormone therapy
gynecologic disorders
Estrogens are most often administered with a _______ in combination oral contraceptives (COC)
progestin
COC MOA
suppresses LH and FSH by interfering with hypothalamic gonadotropin-releasing hormone and pituitary gonadotropin secretion
Ovulation is suppressed by inhibition of the mid-cycle LH surge
Suppression of ovarian folliculogenesis via suppression of pituitary follicle stimulating hormone secretion
Why we give estrogen and progesterone
estrogen - potentiates progesterone so lower doses can be used, allows for endometrial growth so less breakthrough bleeding
progesterone - protects against estrogen-induced endometrial hyperplasia
Progestin related mechanisms:
endometrium becomes less suitable for implantation
cervical mucus thickens and becomes less permeable to penetration by sperm
Level of activity: High
Norgestrel
Levonorgestrel
Level of activity: Moderate
Norethindrone
Norethindrone acetate
Level of Activity: Low
Ethynodiol
Norgestimate
Desogestrel
Drospirenone
Dienogest
Benefits of COCs (Noncontraceptive)
Abnormal or dysfunctional uterine bleeding
Dysmenorrhea
PMS and PMDD
Endometriosis
Adenomyosis
Functional ovarian cysts
PCOS
Hormone replacement in women with primary hypogonadism
Potential adverse effects of COC
HTN
Thromboembolism: DVT, PE, stroke
Changes in lipids (decreased HDL)
Bleeding irregularities
Nausea
Mood changes
Breast changes
Wt gain
HA
Estrogen Deficiency can cause
vasomotor symptoms
Estrogen Excess can cause
chloasma (melasma)
Menorrhagia and clotting
increased breast size
Progestin Deficiency
breakthrough bleeding
delayed withdrawal bleeding
dysmenorrhea
heavy flow/ clots
Progestin Excess can cause
Candidiasis
appetite increase
depression
fatigue
libido decrease
Androgen Excess can cause
acne
Hirsutism
libido increase
oily skin and scalp
edema
Contraindications to estrogen-containing contraception
Thromboembolic disorders
smokers > 35 yo
impaired liver function
abnormal vaginal bleeding
pregnancy
cardiac disease
migraine
Consider progestin only contraceptive options
Drug interactions
Anticonvulsants - phenytoin, carbamazepine, barbiturates, topiramate
Antibiotics - rifampin
Drugs used to treat HIV
Emergency Contraception MOA
works by delaying or blocking ovulation
Emergency contraceptives must be used within
72 hours of unprotected intercourse
Emergency Contraception is ineffective once
implantation has occurred
Options for emergency contraception include
levonorgestrel (Plan B)
Ulipristal (high dose progestin)
COC (higher dose hormones)
Copper IUD
Levonorgestrel MOA
prevents ovulation or fertilization, alters endometrium
Levonorgestrel is contraindicated in
known or suspected pregnancy
Levonorgestrel adverse reactions
generally well tolerated, may cause GI upset, re-administer if vomiting within 2 hours