1: General Contraception Flashcards
What type of pills are usually used for extended / continuous COC regimens?
Monophasic are generally preferred.
Which progestin is not testosterone derived?
Drospirenone
Who accounts for the least and most unintended pregnancies?
- Women who use contraceptives consistently and correctly account for 5%.
- Women who do not use contraceptives or have a gap of 1 month or more account for 54% of unintended pregnancies.
What are the two approaches to vasectomies?
- Conventional vasectomy: One midline or two lateral incisions in the scrotum. The vas is lifted out through the incision and occluded. The opening is then sutured.
- “No-scalpel” method: Skin of the scrotum is pierced and the vas exposed and blocked through an opening so small it does not require stitches.
When does the Standard Days method avoid intercourse?
Cycle days 8-19.
When should Nexplanon be inserted?
During the first 7 days of the menses, postpartum, or post abortion, to avoid pregnancy in the first cycle.
What are the advantages / disadvantages to Sunday start?
No bleeding on weekends, but must use backup method for 7 days.
Which patient population would be most likely to have failure with tubal sterilization?
Those who are younger at the time of sterilization.
Which methods of birth control have the highest effectiveness and why?
LARCs (IUDs and subdermal implants) because it removes user consistency and error.
What are some methods of female sterilization?
- Occluding the fallopian tubes: unipolar or bipolar electrocoagulation; mechanical occlusion; and ligation or salpingectomy.
- Transcervical sterilization method (Essure) is performed via hysteroscopy and can be done in an office setting.
Which IUD is the smallest?
Skyla
How well a method works inherently. This describes the likelihood that an unintended pregnancy will occur even when the method is used consistently and exactly as prescribed. Based on “perfect use.”
Efficacy
When is a vasectomy effective?
15-20 ejaculations. Current recommendation is to wait 3 months rather than a set number of ejaculations.
How often are DMPA / Depo injections given?
Every 13 weeks
How long is each patch used?
- Worn for 1 week at a time.
- The patch is changed weekly on the same day of the week for 3 weeks.
- No patch is worn for 1 week to allow for a withdrawal bleed.
What followup is important with transcervical sterilization/Essure?
After placement, tissue grows into the insert or matrix, effectively blocking the tubes. A hysterosalpingogram (HSG) must be performed 3 months after the procedure to confirm tubal occlusion, and women must continue to use reliable contraception until sterilization effectiveness is confirmed with HSG.
What should determine whether a particular contraceptive method is inappropriate for a woman?
Clinicians should rely only on evidence-based contraindications to avoid unnecessarily restricting contraceptive options when determining whether the woman’s history makes a particular method acceptable.
What is the point of entry for many sexually transmitted pathogens?
Cervix
T/F So long as levels are checked frequently, women predisposed to hyperkalemia may use drospirenone-containing COCs.
False. They should use other methods.
T/F Overestimation of contraceptive risks and benefits are common and must be addressed.
False. Overestimation of contraceptive risks and underestimation of health benefits are common and must be addressed.
How much estrogen is contained in COCs today?
Most of the COCs available today contain 10 to 35 mcg of ethinyl estradiol, although a few COCs contain 50 mcg of ethinyl estradiol or mestranol, the methyl ether of ethinyl estradiol.
Is a conventional or no-scalpel method of vasectomy better?
A systematic review showed that the no-scalpel approach resulted in less bleeding, hematoma, infection, and pain as well as a shorter operation time than the traditional incision technique, with no difference in effectiveness
What are the contraindications for emergency contraception (ECP)?
- Levonorgestrel ECPs, combined ECPs, and ulipristal acetate should not be given to women with a known or suspected pregnancy; there are no other contraindications to their use.
- The usual contraindications and precautions for ongoing COC and POP use do not apply to ECP.
- The usual contraindications and precautions to copper IUDs used for ECP.
What patient education should occur for missed COC pills?
- If one pill is missed and is less than 48 hours late, take the late or missed pills as soon as possible and continue taking the remaining pills at the usual time. No backup method or emergency contraception is needed.
- If two or more consecutive hormonal pills have been missed and it is more 48 hours or more since a pill should have been taken, take the most recent pill as soon as possible (any other missed pills should be discarded). Continue taking the remaining pills at the usual time and use a backup method or avoid sexual intercourse until hormonal pills have been taken for 7 consecutive days.
- If pills were missed during the last week of hormonal pills, finish the remaining hormonal pills and start new pill pack the following day.
- Emergency contraception should be considered if pills were missed during the first week and sexual intercourse occurred during last 5 days.
Name the 4 nonhormonal, physiologic methods of birth control.
- Abstinence
- Coitus interruptus
- Lactational amenorrhea method (breastfeeding)
- Fertility awareness based (FAB) methods
Where can the patch be applied?
- Buttocks
- Upper arm
- Abdomen
- Anywhere on the upper torso except the breasts.
Does laparoscopic or hysteroscopic sterilization have a higher failure rate?
Hysteroscopic
What lab test is important with drospirenone?
- K levels.
- Drospirenone has a mild potassium-sparing diuretic effect, necessitating that potassium levels be checked during the first cycle in women using ACE inhibitors, chronic daily NSAIDs, angiotensin-II receptor antagonists, potassium-sparing diuretics, heparin, or aldosterone antagonists.
What percentage of women using contraception choose reversible?
64%
Which meds can affect COC effectiveness?
Medications that can reduce the effectiveness of COCs include antiretroviral therapy, rifampin, griseofulvin, and some anticonvulsants (e.g., carbamazepine, phenytoin, barbiturates, primidone, topiramate, oxcarbazepine, lamotrigine), as well as some over-the-counter herbal supplements such as St. John’s wort.
How is the size of a FemCap determined?
- 22-cm FemCap is for women who have never been pregnant
- 26-cm FemCap is for women who have had a miscarriage, abortion, or cesarean birth
- 30-cm FemCap is for women who have had a vaginal birth
Why is there little decrease in seminal fluid after a vasectomy?
Sperm account for only 5% of the semen that is produced by the prostate and other glands; thus, there is only a minimal decrease in the amount of seminal fluid following male sterilization.
When is a failure most likely to occur with contraceptives?
Most failures are concentrated in early usage. More fertile women will have earlier failures, and women who use contraception incorrectly or inconsistently will get pregnant sooner. In addition, older women are less fecund (able to get pregnant) than younger women; thus any method used by younger women will have a higher failure rate than when the same method is used by older women.