IT is not only the caffeine in coffee you have to watch out for – drinking too much coffee can radically reduce a man’s ability to father children, a study has found.
Men who drank two or more cups of strong coffee a day had just a one in five chance of becoming fathers through IVF. However, for those who drank less than a cup, the chance of having a child rose to nearly 52 %.
The researchers at Massachusetts General Hospital, Boston, told a conference in Hawaii that caffeine may harm sperm at a molecular level. A shot of espresso contains around 100mg of caffeine. Those men who drank 265mg or more had the least chance of becoming fathers.
The study also showed that men who drink around a pint and a half of beer a night could improve their fertility.
Current NHS advice suggests that men should not drink more than four units a day, the equivalent of around two pints of beer.
The research found that men who drank at least 22g of alcohol per day, or three units, were more than twice as likely to have children through IVF than those who abstained. Health experts say that moderate amounts of alcohol may reduce stress levels and help conception.
The study looked at 105 men of an average age of 37 whose wives or girlfriends were undergoing IVF at the Massachusetts hospital between 2007 and 2013.
– The Daily Telegraph.