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A study Stanford University the USA reports that babies older fathers may be more likely to have health problems. Scientists studied data 40,529,905 births in the USA 2007 and 2016 to ascertain whether a father's age adversely affects his child's health. Researchers discovered that compared to babies born to fathers the 25-to-34 age bracket, babies born to fathers the age of 45 were at greater risk of being born health problems. These included being born prematurely, having a low birth weight or being admitted to a neonatal intensive care unit. The researchers added that babies born to older fathers were generally not as healthy as those conceived younger fathers.

One scientist said a lot more detailed research was needed to prove that older fathers conceive less-healthy babies. Dr Michael Eisenberg the Stanford University School of Medicine said: "I think it's important to understand that the risks we are seeing are modest. So an individual, the risk may not change much." He added that his team's data could show a trend that health departments governments might want to be aware . He said: "At a population level, there may be public health implications men...waiting longer to conceive." Dr Eisenberg concluded that: "While the oldest father ever is 96, this research suggests that the risk to child and mother may increase if fathers conceive later.

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