Male fertility does change with age. You might get the impression that age only matters in female fertility. While the change in fertility is more drastic in women, men have biological clocks, too. The study looked at everything a semen analysis would, including how often they had sex.
Sperm Quality Declines Significantly After Age 50
How Age Matters For Your Fertility | Your Fertility
By age 30 years, fertility the ability to get pregnant starts to decline. This decline becomes more rapid once you reach your mid 30s. By age 45 years, fertility has declined so much that getting pregnant naturally is unlikely for most women. For healthy couples in their 20s and early 30s, around 1 in 4 women will get pregnant in any single menstrual cycle. By age 40 years, around 1 in 10 women will get pregnant per menstrual cycle. Women become less fertile as they age because they begin life with a fixed number of eggs in their ovaries. The number of eggs decreases as women get older.
Fertility and the Aging Male
The trend in parenthood at an older age has also been seen in men. Age-related infertility will continue to be a problem. A basic understanding of the issues is critical for health care professionals so that they can effectively counsel patients who are considering a delay in childbearing for social reasons or for those seeking fertility treatments.
Men who delay starting a family have a ticking "biological clock" -- just like women -- that may affect the health of their partners and children, according to Rutgers researchers. The study, which reviewed 40 years of research on the effect of parental age on fertility, pregnancy and the health of children, was published in the journal Maturitas. While the medical profession has no clearly accepted definition of when advanced paternal age begins -- it ranges from 35 to 45 -- infants born to fathers over 45 have risen 10 percent in the United States over the past 40 years, likely due to assisted reproductive technology. The study found that men 45 and older can experience decreased fertility and put their partners at risk for increased pregnancy complications such as gestational diabetes, preeclampsia and preterm birth. Infants born to older fathers were found to be at higher risk of premature birth, late still birth, low Apgar scores, low birth weight, higher incidence of newborn seizures and birth defects such as congenital heart disease and cleft palate.