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Guys have a biological clock, too

While scientists and doctors have long known that a woman’s chances of having a child drop the older they are, a new study suggests that a man’s age can have an impact on a few chances.

According to a new study from the Beth Israel Deaconess Medical Center and Harvard Medical School, the incidence of live birth drops significantly as men age.

The study analyzed 19,000 in-vitro fertilization cycles in 7,753 set in an IVF center between 2000 and 2014, according to a press release from the European Study of Human Reproduction and Embryology.

“Decline in the quality of the sperm certainly plays a role, but our work shows that this is not the whole picture,” says the lead researcher. “We found similar results for the couples with a non-documented male infertility, so something else is going on.” Researchers of the participants divided into four age groups: under 30, 30 to 35, 35-40, 40-42.

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They found that the younger the man was, on the average, the better the woman’s chances of having a successful delivery. For example, the Guardian reports, women under 30 had a 73 percent chance of success with IVF if their partners were between the 30 and 35.

Women in the same category of which the partners were between the 40 and 42 saw that number drop to 46 percent. In women of 35 to 40 years old of which the partners were between the 30 and 35, there was a 54 percent chance of a live-born child.

That increased to 70 percent in men under 30. The research “can help the women to boost their male partners need to hurry,” said a professor of obstetrics is not involved in the study.

“This reminds us that’ it takes two to tango and it is not only down to the age of the woman.” (Older fathers make for geekier sons.)

This article originally appeared on Newser: Bad News, Guys: Your Biological Clock is Ticking,

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