No matter your particular preferences between the sheets, sexual behavior is unbelievably complex. All that goes into sex, happens during it, and can happen as a result can make for many questions for those who are curious. While some of this pondering may be purely entertaining, learning about sex can also be a meaningful endeavor. Related: The 11 Health Benefits of Sex. Although the Centers for Disease Control and Prevention CDC reports that the average age of first vaginal sexual intercourse has remained fairly stable at about 17 years for both men and women, it looks like teens are increasingly holding off on losing their V-card. The percent of unmarried females ages who ever had sex dropped from 68 percent in to For men the numbers dropped from Contrary to what you might think, sex before marriage hasbeen common for a long time. Looking at women specifically, a report from the GuttmacherInstitute showed that 48 percent of women who turned 15 during the years to had premarital sex by the age of
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But two years and two cycles of IVF later , Andy who didn't want us to share his surname to protect his anonymity found himself facing a stark choice. At years-old, he was told that he and his wife's failure to conceive was due to low embryo quality and this was far more likely to be a result of his sperm than his wife's eggs. Doctors' explained, in no uncertain terms, that while it wasn't impossible for Andy to father his own child, the chance of it happening was "unlikely". But, like most men I imagine, I never thought it would be me. Andy is far from alone. According to the latest figures from the Human Fertilization and Embryology Authority HFEA , there has been a sharp rise in the number of people using donor sperm in IVF, up from 1, men in to 5, in Meanwhile, cycles using donor eggs and donor sperm have also increased fold from 27 cycles in to 1, cycles in That trend doesn't look like changing course anytime soon. A major worldwide study published in found that the percentage of men who were at risk of needing fertility treatment increased from While the reason for this rise is not entirely clear, what is known is that heat, chemicals and toxins can all cause sperm quality to deteriorate, so environmental and lifestyle factors are thought to play a part.
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For years women have lived under the threat of a ticking fertility time bomb. But, according to new research, men might have a biological clock, too. While there has been extensive research regarding infertility and potential complications in an ageing mother, relatively few studies have explored similar reproductive factors in ageing men. However, evidence suggests a decrease in fertility and an increase in pregnancy complications such as gestational diabetes, intrauterine growth restriction and preterm birth. Additionally, children born to older men could have increased risks of chromosomal and non-chromosomal birth defects and an increased incidence of childhood autism and cancers. To reach its conclusions the study reviewed 40 years worth of research on the effects paternal age had on fertility, pregnancy and the health of offspring. Study authors suspect this could be down to the natural decline in testosterone levels men experience as they age, in addition to a reduction in semen quality.
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