Question at position 15 Are males or females more likely to be infertile?They are about as likely to be infertileWe can't actually tellFemales are more likely to be infertileMales are more likely to be infertile

Question

BlackTom AI · Accepted Answer

Infertility is defined as failure to achieve pregnancy after 12 months of unprotected intercourse (or 6 months for women older than 35). Key epidemiological findings show that reproductive problems originate in males and females at roughly similar rates when couples are evaluated.

Relevant knowledge points:
- Infertility can be due to male factors (e.g., low sperm count, poor motility, abnormal morphology), female factors (e.g., ovulatory disorders, tubal disease, endometriosis, uterine anomalies), combined factors, or unexplained causes.
- Population and clinic-based studies consistently find that male and female contributions are comparable: roughly 30–40% of infertility cases are attributed primarily to female factors, about 20–30% primarily to male factors, and the remainder are combined factors or unexplained. When considering contributions (not just sole causes), a male factor is involved in up to about half of cases.

Step-by-step reasoning:
1. Start with the standard definition to set the diagnostic threshold (12 months of unprotected intercourse).
2. Look at how causes are distributed: data show a substantial proportion of infertility is due to female causes and a substantial proportion due to male causes; many cases involve both partners or are unexplained.
3. Because male-only and female-only causes occur at similar frequencies and male contributions co-occur in many mixed cases, the overall likelihood of a man versus a woman being infertile is about the same at the population level.
4. Therefore the statement that “They are about as likely to be infertile” best reflects the evidence.

Why the other options are incorrect:
- “We can’t actually tell” is false because epidemiological studies provide clear estimates of causes.
- “Females are more likely” or “Males are more likely” are both misleading given that neither sex predominates consistently; data indicate roughly equal contributions.

Conclusion: The correct answer is “They are about as likely to be infertile,” which matches the provided answer.

Question at position 15 Are males or females more likely to be infertile?They are about as likely to be infertileWe can't actually tellFemales are more likely to be infertileMales are more likely to be infertile单项选择题

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