Pregnant women infected with HIV are more liekly to spread the virus to their children if they are carrying twins,according to a report in the journal AIDS.Laurent Mandelbrot of the University of Paris,and associates investigated mother-to-child spread of HIV in twins,compared with single twins,compared with single infants,born to HIV-infected mothers in the French Perinatal HIV Cohort.Before the advent of highly active antiretroviral therapy,an effective combination of anti-HIV drugs,the mother-to-child HIV transmission rate in twin pregnancies was two to three times that in singleton pregnancies.
A man usually needs about two or three minutes of stimulation to have an orgasm,a woman generally needs 10 times more. For a man,an orgasm is instinctive.For a woman,it happens only after direct stimulation of the clitoris. A man's climax usually lasts for 10-13 seconds.For a woman,it lasts 6-60 seconds. A man must recuperate after an orgasm but a woman can have repeated orgasms within minutes or in rapid succession. Wonder why a man rolls over and sleeps after? During sex,his body releases oxytocin,a hormone that induces drowsiness.A woman is more relaxed after sex,which is why she wants to talk or cuddle.
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