Why being an older dad is risky for babies and mums
Babies born to older men tend to have lower Apgar scores, a higher chance of being premature and are more likely to weigh less at birth, a new study says.
The babies' mothers also face higher risks of gestational diabetes.
Even though the absolute risks remain low, the findings are relevant to parents planning their reproductive future, according to the authors of the US study.
They have found that as the age of the father increases, so does the risk of the infant being born prematurely, having a low birth weight and requiring support after delivery.
The Californian researchers looked at data on the almost 40,530,000 live births in the US between 2007 and 2016 to assess the impact of a father’s age on outcomes for the baby and mother.
They adjusted the data for maternal age and other potential confounders.
Over the study period, the mean age of the fathers increased from