Which of the following is true of the effectiveness of vasectomies?

A. Vasectomies are not always effective right after they are performed.
B. Vasectomies are only effective when performed on men under 30.
C. Vasectomies have a higher failure rate than that of birth control pills.
D. Vasectomies have a higher failure rate than that of contraceptive foams.


Answer: A

Interdisciplinary Studies

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The fraternal birth order effect shows that

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