Sentence examples for intercourse about from inspiring English sources

According to a 2004 study, "American Sexual Behavior," by the National Opinion Research Center at the University of Chicago, married couples have intercourse about 66 times a year.

In studies, men who took 2 milligrams of Uprima had an erection that enabled intercourse about 47percentt of the time.

"If the male partner withdraws before ejaculation every time a couple has vaginal intercourse, about 4percentt of couples will become pregnant over the course of a year," the authors write.

Women who have unprotected intercourse have about 1 chance in 20 of becoming pregnant.

Voluntary medical male circumcision decreases the risk in males of HIV infection through heterosexual intercourse by about 60% in clinical trials and 73% at post-trial followup.

Adolescents who had ever had sexual intercourse were about 4 times (AOR = 4, 95% CI: 2.09, 6.89) more likely to use VCT services than abstainers.

The mean scores of intention to delay intercourse, beliefs about pregnancy, beliefs about HIV, attitude towards delayed sexual intercourse, self-efficacy to delay intercourse and the perceived social norm were just below or just over 4 (e.g. agree), which is relatively high.

But better contraceptive practices and delays in first intercourse have contributed about equally to a 35percentt decline in birth rates among 15- to 17-year-olds in the United States, and to an even more impressive 46percentt decline among non-Hispanic blacks that age, according to the C.D.C. analysis of several studies.

Later studies of per-contact infectivity showed that receptive UAI with an infected partner was the riskiest sexual practice more than 10-fold more likely to result in infection than insertive intercourse, which carried about as much risk as oral sex [16].

Women who have unprotected intercourse have about one chance in 20 of becoming pregnant.

Given that the risk of HIV transmission via anal intercourse is about 10 times greater than for vaginal intercourse [ 8], it cannot be assumed that the effectiveness of TasP will be identical for the two types of sex.