5. Contraception Flashcards
Contraceptive effectiveness depends on what? (2)
- Inherent effectiveness in preventing pregnancy
- How consistently and correctly it is used
Describe history: Contraception (3)
- As patient compliance is key, a method should be chosen that will match patient needs and preferences.
- Knowing what types of contraception have been used before, if any, and previous side effects, is useful in helping a patient choose a type of contraception that will be used consistently and correctly.
- Hx should also screen for contraindications
Describe physical exam: Contraception (2)
- Blood pressure is important to document prior to starting hormonal contraception.
- Based on Hx, patient may need cervical cultures, Pap test, or pregnancy test.
Name absolute CIs to OCP (14)
- < 6 wk postpartum if breast-feeding
- Breast CA (current)
- Smoker > 35 y.o. (> 15 cigarette/d)
- Uncontrolled HTN (systolic > 160 mm Hg or diastolic > 100 mm Hg
- Venous thromboembolism (current or Hx)
- Ischemic heart disease
- Valvular heart disease (PulmHTN, A b, Hx of SBE)
- Diabetes with retinopathy/nephropathy/neuropathy
- Migraine headaches with focal neurologic Sx
- Severe cirrhosis
- Liver tumor (adenoma or hepatoma)
- Undiagnosed vaginal bleeding
- Known thrombophilia
- Known or suspected pregnancy
Name relative CIs to OCP (8)
- Smoker over the age of 35 (< 15 cigarette/d)
- Adequately controlled HTN
- HTN (systolic 140–159 mm Hg, diastolic 90–99 mm Hg)
- Migraine headache over the age of 35
- Currently symptomatic gallbladder disease
- Mild cirrhosis
- Hx of OCP-related cholestasis
- Users of medications that may interfere with OCP metabolism
Describe: Natural Family Planning (1)
Name different Natural Contraceptive Method (5)
- Calendar (periodical abstinence)
- Ovulation method (periodical abstinence)
- Symptothermal (periodic abstinence)
- Lactational amenorrhea
- Coitus interruptus/withdrawal
Name Percentage of Women with Unintended Pregnancy if: Regular Unprotected Intercourse
85%
Describe this type of natural contraceptive method: Calendar (3)
- Calculate onset and duration of fertile period based on ovulation 12–16 d before menstruation, 5-d sperm survival, and 24-h unfertilized oocyte survival
- Avoid intercourse during 8–10 d of cycle
- Percentage of Women with Unintended Pregnancy: 9% (perfect us) vs 24% (typical use)
Describe this type of natural contraceptive method: Ovulation method (3)
- Monitor volume and quality Δs in mucus
- Mucus becomes clearer and more elastic as ovulation approaches (spinnarkeit), then viscous, opaque, and impenetrable to sperm after ovulation
- Percentage of Women with Unintended Pregnancy: Perfect us 3%
Describe this type of natural contraceptive method: Symptothermal method (3)
- Ovulation/cervical mucous method supplemented with calendar method in preovulatory phase and basal body temperature in postovulatory phase
- Basal body temperature:
- Following the postovulatory elevation in progesterone, basal body temperature should rise by at least 0.5°C.
- Percentage of Women with Unintended Pregnancy: 2% (perfect use)
Describe this type of natural contraceptive method: Lactational amenorrhea (2)
- Temporary postpartum method of contraception based on hormonal suppression of ovulation in breast-feeding women (exclusive breast-feeding only)
- Percentage of Women with Unintended Pregnancy: 2% (perfect use)
Describe this type of natural contraceptive method: Coitus interruptus/withdrawal (2)
- Male withdraws penis from vagina before ejaculation.
- Percentage of Women with Unintended Pregnancy: 4% (perfect use) vs 27% (typical use)
Name barrier methods for contraception (6)
- Male condom (Latex, Polyurethane, Lamb skin)
- Female condom - Polyurethane sheath placed in vagina
- Diaphragm
- Cervical cap
- Sponge
- Spermicide
Describe Mechanism of Action: Male condom (2)
- Mechanical barrier prevents exchange of fluid/semen and ↓ contact of genital lesions.
- Prevent pregnancy and STI
Name CIs and cautions: Male condom (2)
- Allergy or sensitivity
- No STI protection with lambskin or novelty condoms
Describe: Female condom (1)
Polyurethane sheath placed in vagina
Describe Mechanism of Action: Female condom (3)
- Completely lines vagina
- Mechanical barrier prevents exchange of fluid/semen and ↓ contact of genital lesions.
- STI prevention similar to male latex condom
Name CIs and Cautions: Female condom (3)
- Allergy or sensitivity
- Abnormal vaginal anatomy
- Inability to insert
Describe: Diaphragm (1)
Intravaginal barrier method used with spermicide
Describe the mechanism of action: Diaphragm (2)
- Physical barrier between sperm and cervix used in conjunction with spermicide
- Associated with ↓ cervical neoplasia, dysplasia, gonorrhea, PID, and tubal infertility
Name CIs and cautions: Diaphragm (8)
- Allergy or sensitivity
- Large rectocele, cystocele, or uterine prolapse (↓ efficacy)
- ↑Risk BV and UTI
- Vaginal bleeding
- Cervical or uterine CA or dysplasia
- Current vaginal or cervical infection or PID
- Recurrent vaginal, cervical or UTI
- Requires specialist fitting and reassessment with changes in weight and parity
Describe: Cervical cap (1)
Intravaginal barrier method used with spermicide
Describe mechanism of action: Cervical cap (2)
- Silicone cap acts as physical barrier between sperm and cervix used in conjunction with spermicide
- Protects against chlamydia and gonorrhea