Gynecology Flashcards
Ages menarche and menopause
Menarche - avg. onset age 12
Menopause - avg. onset 51 yr
Primary vs. secondary amenorrhea
Primary
- no menses by age 16 with secondary sexual characteristics
- no menses by age 14 with normal secondary sexual characteristics
Secondary
- cessation of previously normal menses >6mo or no menses for 3+ normal cycles
Thelarche
- breast development, begins age 9-11
Tanner staging for breast
None Breast bud Increase size areola and breasts Secondary mound of areola and papilla Areola recessed to contour of breast
Tanner staging pubic hair
None
Downy hair along labia
Darker/coarse hair extends over pubis
Adult-type hair covers smaller areas (no thigh)
Adult hair in quantity and type, extends over thighs
(pubarche = pubic and axillary hair, age 11-12)
Sheehan syndrome
Postpartum pituitary necrosis after significant PPH (secondary amenorrhea)
Asherman syndrome
Intrauterine adhesions after endometritis, D&C, or scarring after delivery (secondary amenorrhea)
Dysmenorrhea
Painful menstruation of uterine origin
Turner syndrome
45 XO
gonadal dysgenesis
Swyer syndrome
46 XY
gonadal dysgenesis
PCOS diagnostic criteria
2/3
- chronic anovulation
- biochemical (elevated testosterone) or physical signs of hyperandreogenism
- polycystic ovaries seen on ultrasound
Primary ovarian insufficiency (POI)
- elevated FSH, decreased estrogen
- often intermittent ovarian function (can become pregnant)
- hormone replacement therapy until menopause
Functional hypothalamic amenorrhea (FHA)
- decreased FSH and estrogen
- dx exclusion
- suppression of pulsatile GnRH secretion from hypothalamus
Primary dysmenorrhea
- menses pain not because organic disease
- ovulatory cycles, improves third decade and after childbirth
- beings 6mo - 2yr after menarche
- pain due to prolonged myometrial uterine contractions and reduced blood flow to myometrium
- induced by increased prostaglandins production in secretory endometrium during ovulatory cycles
First line tx dysmenorrhea
NSAIDS and/or OCPs
Menorrhagia
Prolonged (>7d) or excessive (>80mL) bleeding occurring at regular intervals
Metrorrhagia
Bleeding occurring at irregular intervals
Menometrorrhagia
Excessive bleeding during normal menses and at other irregular intervals
Polymenorrhea
Bleeding at intervals <21d
Intermenstrual bleeding
Bleeding between regular cycles
Postcoital
Bleeding after vaginal intercourse
Postmenopausal
Any bleeding following menopause
DVB
Abnormal bleeding not due to organic disease (dx exclusion)
Change in ovarian function with perimenopause and menopause
Perimenopause - decrease ovarian follicle pool -> decrease inhibit -> increase FSH -> less FSH receptors in reduced follicle number -> poor dominant follicle development -> anovulatory cycles = irregular menses
Menopause - depleted ovarian reserve -> chronic anovulatory cycles -> E and P deficiency (no corpus leuteum)
Postmenopausal vaginal bleeding
Endometrial cancer until proven otherwise
Investigation of bleeding at >20wk gestation
US to r/o placenta previa BEFORE pelvic exam
Rx ovulatory abnormal vaginal bleeding
NSAIDs - endometrial PG = reduced menstrual flow
Antifibrinolytics - reduce menstrual bleeding
Mirena IUD - reversible blockade of plasminogen = reduced menstrual loss
Premenstrual Dysphoric Disorder
PMDD = severe form of PMS
- primarily mood sx
- > 2 consecutive cycles in premenstrual phase
Premenstrual Syndrome
At least 1 affective and 1 somatic sx during the 5d before menses in 3 prior menstrual cycles
Sx relieved within 4d menses onset
Barrier methods contraception (failure rate)
Male condom (typical 18%, perfect 2%)
Female condom (typical 21%, perfect 5%)
Diaphragm (typical 12%, perfect 6%)
Cervical Cap ( typical: multip 23%, nullip 13%; perfect multip 26%, nullip 9%)
Sponge (typical multip 24%, nullip 12%; perfect multip 20%, nullip 9%)
Spermicide (typical 28%, perfect 18%)
OCP effectiveness
Perfect use = 99.9%
Typical use = failure rate 3-8%
OCP
- P component main reason for contraceptive effect
- Fertility 1-3mo after d/c
Combined contraceptives (failure rate)
Patch (typical 8%, perfect 0.3%) Vaginal ring (typical 6%, perfect 0.3%)
P only contraception
Injectable - failure rate <0.3%/yr
Oral - failure rate typical 5-10%, perfect 0.5%
inhibits secretion of pituitary gonadotropins = suppress ovulation, increase viscosity cervical mucous, induces decidualization of endometrium
IUD
- if pregnancy, risk of ectopic high
Copper - failure rate 0.8% - foreign body reaction (sterile inflammation), copper ions affect sperm motility
LNG - failure rate 0.1%
- foreign body reaction and endometrial decidualization and glandular atrophy; endometrial E and P receptor suppression thickened cervical mucous; ovulation inhibition
Plan B EC
Levonorgestrel-only method (2 doses 750 micrograms 12h apart OR single dose 1.5mg), approved by Health Canada
Stillbirth
Death >20wk GA or weighing >500g
Spontaneous abortion/ miscarriage
Pregnancy which ends spontaneously before fetus reaches 500g or 20 wk GA
Intrauterine fetal demise
Pregnancy ends spontaneously after 10-20wk
How many miscarriages occur in first 12wk of pregnancy?
80%
% spontaneous abortion due to chromosomal anomalies?
50%
Types of miscarriage
Missed abortion Complete abortion Incomplete abortion Threatened abortion Inevitable abortion Septic abortion Recurrent pregnancy loss
+/- Rhogam if Rh- mom
Missed abortion
no bleeding, cervix closed
death of fetus in uterus with retention of pregnancy
anembryonic pregnancy is type with gestational sac but no fetal pole
- watch and wait
- Misoprostol 400-800 μg PO/PV
- D&C ± oxytocin
Complete abortion
bleeding + complete passage of sac and placenta; cervix closed, bleeding stopped
spontaneous expulsion of all fetal and placental tissue before 20wk GA
- expectant management
Incomplete abortion
very heavy bleeding and cramps +/- passage of tissue; cervix open
incomplete expulsion of products of conception before 20wk GA
- watch and wait
- Misoprostol 400-800 μg PO/PV
- D&C ± oxytocin
Threatened abortion
vaginal bleeding and cramping, cervix closed and soft
bleeding during first 20wk GA without passage of tissue or cervical dilation; presence of fetal cardiac activity (high proportion of pregnancies continue)
- 30-40% all pregnancies
- watch and wait (<5% abort)
Inevitable abortion
bleeding and cramps +/- rupture of membranes; cervix external os opens when start to expel products
bleeding +/- ROM accompanied by cramping and dilation of cervix; gestational tissue may be seen through internal os
- watch and wait
- Misoprostol 400-800 μg PO/PV
- D&C ± oxytocin
Septic abortion
contents of uterus infected
infection of retained products of conception by S. aureus, GN bacilli, or GP cocci
infection can cause peritonitis and sepsis
- D&C
- IV broad spectrum antibiotics
Recurrent pregnancy loss
> =3 spontaneous consecutive first trimester losses
Investigations - thrombophilic, immunologic, endocrine (DM, thyroid, hyperprolactinemia), genetic/ chromosomal, anatomic (septate uterus, leiomyomas, intrauterine synechiae), environmental/toxicologic
-> evaluate mechanical, genetic,
environmental, and other risk factors
Menopause
12 consecutive months of amenorrhea due to loss of ovarian function
- ovulation ceases -> ovaries stop producing estradiol and progesterone but continue to produce testosterone -> small amount of E from peripheral conversion (adipose tissue) of adrenal steroids
- increased FSH and LH, reduced estradiol, increased vaginal pH >6
- screen for osteoporosis
Osteoporosis vs osteopenia
Osteoporosis = BMD >2.5 SD below young adult mean (T score at or below -2.5) Osteopenia = BMD 1-2.5 SD below young adult mean *t score btw -1 and -2.5)