the sponge
withdrawal
the condom
oral contraceptives

2. What percentage of Americans will marry by their late thirties?

75
85
90
95

3. The most common sexual problem of men who seek therapy is...

premature ejaculation
erectile problems
low sexual desire

4. What is the probability of pregnancy over a year's time if no form of contraception is used?

10 percent
30 percent
70 percent
90 percent

5. The leading cause of birth defects in the United States is...

alcohol abuse
cigarette smoking
cocaine addiction