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.
The study, published 30 August in Human Reproduction , used a federal repository of nearly 170 million birth records to find that the average dad is now 30.9 years old at their child's birth—and that 9% of newborns' fathers are at least 40 years old.
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.
Men should start a family before they age of 35 to avoid risk to their unborn babies, researchers claim. A study tracking 40million babies found the risk of birth complications start to increase when fathers are in their mid-30s, and significantly rise from the age of 45.
Having babies after the age of 35 increases the risk of miscarriage, birth defects and other birth-related complications for women. The same doesn't exactly apply for men. Although sperm quality declines with age, men can and do father children well into old age – just ask Mick Jagger, Warren Beatty or Rupert Murdoch.
Age and sperm
Men younger than 40 have a better chance of fathering a child than those older than 40. The quality of the sperm men produce seems to decline as they get older. Most men make millions of new sperm every day, but men older than 40 have fewer healthy sperm than younger men.
There's no maximum age that stops a man from being able to have a baby. You can become a father long into your older years, but there are risks.
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.
“The ideal age to get married, with the least likelihood of divorce in the first five years, is 28 to 32,” says Carrie Krawiec, a marriage and family therapist at Birmingham Maple Clinic in Troy, Michigan. “Called the 'Goldilocks theory,' the idea is that people at this age are not too old and not too young.”
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.
Experts say that a man is best suited for fatherhood in his late 20s and continues to be at his peak till the early 30s.
About 70 percent of all men aged 25 to 29 have no children compared to 45.6 percent of men aged 30 to 34, and 28.4 percent of men aged 35 to 39.
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.
Among men aged 15–49 in 2015–2019, 55.2% had not fathered a biological child, 14.8% had fathered one biological child, 17.4% had fathered two children, 8.2% had fathered three children, and 4.4% had fathered four or more children.
A recent study of more than 40.5 million births in the United States revealed potentially harmful effects of advanced paternal age on a baby's risk of prematurity, low birth weight, low Apgar score and risk of seizures, as well as the mother's chances of developing gestational diabetes.
From a biological standpoint, experts recommend a man is best suited to fatherhood from his late 20s to early 30s. It is still possible for men to father a child in their 50s and older. According to Guinness World Records, the oldest man to father a child was 92 years old at the time of the birth.
If you are thinking about having a baby in your late thirties or early forties, you are not alone. Women ages 35-45 are increasingly becoming first-time moms. And most healthy women in this age group have healthy pregnancies, births and babies.
Older women are more likely to miscarry or have a stillbirth. They have a greater chance of developing gestational diabetes, preeclampsia, and of delivering a baby who is very small. Then there can be problems with labor, resulting in a higher chance of cesarean birth.
As the father grows older, the number of mutations in the father's genome increases, leading to an increase in the incidence of congenital malformations in offspring [11, 65]. Older paternal age may be harmful to the offspring's health in terms of genetic mutations, telomere length, and epigenetics [66].
A woman's peak reproductive years are between the late teens and late 20s. By age 30, fertility (the ability to get pregnant) starts to decline. This decline happens faster once you reach your mid-30s. By 45, fertility has declined so much that getting pregnant naturally is unlikely.
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.
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.
Having Babies After 35 Is Safe
And while it's true that conceiving after 35 comes with an increased risk of complications—like preeclampsia, gestational diabetes, chromosomal abnormalities, and even miscarriage or stillbirth—many people go on to deliver healthy babies.