In those months, the man apparently had sexual intercourse, sometimes unprotected, with scores of men.

For Ovrette, the first dose should be taken within 48 hours of unprotected intercourse.

Here, "trying" means having unprotected intercourse an average of three times a week.

"But by not distinguishing between protected and unprotected sexual intercourse they are saying that condoms don't make a difference."

In this study, the number of contacts (unprotected intercourse) was highly associated with transmission.

In order for this to work effectively, it must be taken within 72 hours of the unprotected intercourse.

Infertility is the inability to get pregnant after a year of unprotected intercourse.

The findings also suggest that women are more likely to become pregnant from a single act of unprotected intercourse than is commonly believed.

Without knowing why, he was having unprotected anal intercourse with multiple partners.

The pill should be taken as soon as possible - within 72 hours of unprotected intercourse.