Female fertility begins to decline many years prior to menopause despite regular ovulatory cycles. A woman’s fertility peaks in her mid-20’s and drops off more steeply after age 35. There are many different reasons why a woman may not conceive a baby.
In about half of the couples who trying to conceive, male infertility plays a role. Male Infertility may be due to low sperm production, low motility, or morphology. There may also be blockages that prevent the delivery of sperm.
A study published in April 2014 by the medical journal JAMA Psychiatry, shows that men have a sort of biological clock as well that can affect psychiatric health of offsprings.