The age where a man is most fertile is between 22 and 25 years. It is suggested to have children before the age of 35. After this age, the male fertility begins to worsen. After 35, the sperm might result in pregnancies where mutations can occur.
Male Fertility Facts
Peak male fertility is around 25-29 years old. Sperm quality begins to decline at 30. At 45, men begin to experience a significant decrease in semen volume. Older men can also take longer to conceive a child.
Am I too old? While certain risks may rise with age, men continue to produce sperm throughout their lives and can father healthy children into old age.
There's no expiration date on when guys can father a child. Case in point: Rocker Mick Jagger just had his eighth child at the age of 73. Since men don't hit menopause—the time in a woman's life where her fertility ends—they can typically continue to father children into their later years.
While delivering at age 35 and older is officially considered “advanced maternal age,” Dr. Kalish notes that in reality, there's no “magic number” for being at-risk for complications. “A healthy 38-year-old could have an easier pregnancy than a 20-year-old who has multiple medical issues,” Dr. Kalish says.
A gap of 3 years or more greatly reduces the chances of sibling rivalry. By this time the older child is secure in him or herself and quite independent. In addition, the mother's body is fully recovered from the challenges of pregnancy and birth of the first child.
Although most men are able to have children well into their 50s and beyond, it becomes gradually more difficult after the age of 40 . There are many reasons for this, including: Sperm quality tends to decrease with age.
Australian dads are among the oldest in the world, and we're not getting any younger. According to the Australian Bureau of Statistics' data on registered births in 2020, the median age of fathers is 33.6 years, rising from 28.5 years in 1975, when data was first collated.
While the majority of children are born to fathers between the ages of 20 and 34, becoming a later-in-life dad is a distinct trend. Current research indicates that since 1980, birth rates have increased 40 percent for men ages 35 to 49.
Older paternal age may be harmful to the offspring's health in terms of genetic mutations, telomere length, and epigenetics [66]. Several lines of evidence suggest that epigenetic changes occur in the sperm of older fathers, particularly defects in DNA methylation [67–69].
Women who want to have a big family should start trying for a baby by 23, experts have warned. Even those who only want one child shouldn't wait past the age of 32, if they really want to become a mother.
Pregnancy in Your 40s
If you get pregnant after 35 years old, experts call this an “advanced maternal age” pregnancy. But it's still possible to get pregnant and deliver a healthy baby in your 40s. Childbirth at older ages has become more common too. Since the 1990s, birth rates in people aged 40-44 have gone up.
A trained expert checks your sperm count, their shape, movement, and other characteristics. In general, if you have a higher number of normal-shaped sperm, it means you have higher fertility. But there are plenty of exceptions to this. A lot of guys with low sperm counts or abnormal semen are still fertile.
Although men never stop producing sperm throughout their lives, sperm production does begin decreasing after age 35. Motility, volume and genetic quality of sperm of older men are less likely to achieve a successful pregnancy even in younger women.
Back in 2017, Eisenberg published a study showing that the number of older men fathering children was on the rise. Now, about 10 percent of infants are born to fathers over the age of 40, whereas four decades ago it was only 4 percent.
Over time, the following notable changes were seen: an increase in the average age of first-time mothers (from 28.4 years in 2011 to 29.7 years in 2021) a decrease in smoking at any time during pregnancy (from 15% in 2009 to 8.7% in 2021)
In addition, those who became dads by age 22 had a 26 percent greater risk of dying in midlife versus those whose first child arrived at age 25 or 26. Those who had their first child between ages 30 and 44 had a 25 percent lower risk of premature death than those who had children at ages 25 and 26.
Trends in Age at First Birth for Men and Women
The average age men become fathers is 27.4. The average age women become mothers is 24, consistent with findings from the U.S. Census Bureau (2011). Men, on average, are three years older than women when they become parents.
After age 35, there's a higher risk of pregnancy-related complications that might lead to a C-section delivery. The risk of chromosomal conditions is higher. Babies born to older mothers have a higher risk of certain chromosomal conditions, such as Down syndrome. The risk of pregnancy loss is higher.
The scientists also note that at the age of 35, the proportion of sperm carrying an X chromosome also seems to increase, meaning older dads are more likely to have daughters. In human reproduction, the Y chromosome is responsible for making a male child.
Women who become pregnant in their 30s and early 40s can have safe, healthy pregnancies, says Ellie Ragsdale, MD, director of fetal intervention at UH Cleveland Medical Center. But they do face a higher risk of some problems.
Despite the growing trends mentioned above, two children still seems to the ideal number. An actual study revealed one to two children is the ideal number for “happiness”, but with two you don't have to deal with the aforementioned only child issues.
"Half-your-age-plus-seven" rule
An often-asserted rule of thumb to determine whether an age difference is socially acceptable holds that a person should never date someone whose age is less than half their own plus seven years.