What is the typical-use efficacy of male condoms?
98%
82%
91%
99%
The Correct Answer is B
Male condoms are a barrier method of contraception that prevent sperm from entering the vaginal canal. Their typical-use failure rate reflects real-world usage, including incorrect or inconsistent use. Typical-use efficacy is lower than perfect-use efficacy. Breakage, slippage, and incorrect application are common causes of failure. Latex condoms also reduce transmission of Neisseria gonorrhoeae, Chlamydia trachomatis, and HIV. The typical-use efficacy of male condoms is approximately 82%, meaning 18 out of 100 women will become pregnant in the first year of use. Perfect-use efficacy is about 98%.
Rationale for correct answers
2. Typical-use efficacy of male condoms is 82%. This accounts for human error such as delayed application, early removal, or improper storage. The question asks for typical-use, not perfect-use, making 82% the correct figure.
Rationale for incorrect answers
1. 98% reflects perfect-use efficacy, not typical-use. This figure assumes correct and consistent use every time, which is not representative of real-world behavior. It overestimates protection in typical scenarios.
3. 91% is the typical-use efficacy of female condoms, not male condoms. This figure is often confused with male condom data but is specific to the internal barrier method.
4. 99% is an exaggerated figure not supported by clinical data for either typical or perfect use. No barrier method achieves 99% efficacy under typical-use conditions.
Take home points
- Male condoms have a typical-use efficacy of 82%, meaning 18% failure rate annually.
- Perfect-use efficacy of male condoms is 98%, assuming no user error.
- Female condoms have a typical-use efficacy of 91%.
- Barrier methods also reduce STI transmission, unlike hormonal methods.
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Correct Answer is B
Explanation
Diaphragmsare dome-shaped barrier contraceptives placed over the cervix to prevent sperm entry. Effective use requires spermicide, which immobilizes or kills sperm. Diaphragms must be fitted by a provider to ensure proper cervical coverage. They should be inserted before intercourseand left in place for at least 6 hourspost-coitus but not more than 24 hoursto reduce risk of Toxic Shock Syndrome. They do not protect against STIs. Normal vaginal pH (3.8–4.5) is not altered by diaphragm use, but spermicide may cause irritation in some users.
Rationale for correct answers
2.Diaphragms must be used with spermicide to ensure contraceptive efficacy. The spermicide acts as a chemical barrier, enhancing the physical barrier provided by the diaphragm. Without spermicide, the diaphragm alone is insufficient to prevent pregnancy.
Rationale for incorrect answers
1.Diaphragms are not inserted daily but only before intercourse. Daily insertion is unnecessary and may increase risk of irritation or infection. The timing of insertion is intercourse-dependent, not routine.
3.Prescription antibiotics are not required for diaphragm use. There is no prophylactic indication unless an infection is present. Routine use of antibiotics would pose unnecessary risk of resistance and side effects.
4.Diaphragms must remain in place for at least 6 hours after intercourse to ensure sperm are immobilized or killed. Removal after 2 hours is too early and compromises effectiveness. Maximum retention should not exceed 24 hours to avoid Toxic Shock Syndrome.
Take home points
- Diaphragms require spermicide for effective contraception.
- They must remain in place for at least 6 hours post-intercourse.
- Daily insertion is not recommended or necessary.
- Antibiotics are not part of routine diaphragm use.
Correct Answer is C
Explanation
Female condomsare barrier contraceptives designed for internal vaginal use. They provide dual protectionagainst pregnancy and sexually transmitted infections (STIs). Their polyurethaneor nitrilecomposition makes them non-latex and suitable for latex-allergic individuals. They can be inserted up to 8 hoursbefore intercourse, offering flexibility. Unlike male condoms, female condoms cover the external genitalia, reducing exposure to pathogens. They do not require an erection for placement and are not dependent on male cooperation. Normal vaginal pH is 3.8–4.5; female condoms do not alter this environment.
Rationale for correct answers
3.Female condoms can be inserted up to 8 hours before intercourse, allowing for spontaneity and convenience. This feature is unique to female condoms and is not shared by male condoms, which must be applied immediately before intercourse. The question stem asks for a primary advantage, and this timing flexibility is a scientifically supported benefit.
Rationale for incorrect answers
1.Female condoms are generally more expensive than male condoms. The cost per unit is higher due to manufacturing complexity and lower market volume. This makes them less accessible in low-resource settings, negating cost as an advantage.
2.Aesthetic preference is subjective and not a scientifically validated advantage. Studies show mixed responses regarding user satisfaction and appearance. The bulkiness and external ring may be considered less appealing by some users.
4.Female condoms offer comparable, not superior, protection against STIs. While they cover more external genitalia, male latex condoms have higher tensile strength and lower breakage rates. Neither offers complete protection against all STIs, especially those transmitted via skin-to-skin contact like herpes simplex virus or human papillomavirus.
Take home points
- Female condoms can be inserted up to 8 hours before intercourse, offering timing flexibility.
- They are more expensive than male condoms and less widely available.
- Both male and female condoms offer protection against STIs but not complete coverage.
- Aesthetic preference is not a scientifically supported advantage of female condoms.
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