Drinking 4 cups of coffee each day reduces the chance of having children by 25%

Drinking plenty of coffee every day seriously affects women's ability to have children, experts warn. This effect is as bad as the problems caused by mother drinking, smoking or obesity during pregnancy.

Dutch researchers tracked the health and habits of 9,000 women who had problems with reproductive problems during the 13 years after they ended treatment in vitro fertilization.

Some of this group has children thanks to fertilization therapy, others do not. About 1,350 people had natural babies after treatment, with most pregnancies occurring in the first year.

When a research team from Radbout University in Nijmegen found out why a woman conceives naturally, others do not, they discover that life plays a decisive role.

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People who drink up to 4 cups of coffee, tea or other caffeinated drinks daily lose 26% of their chances of having a baby.

The effect of having three or more drinks per week had the same effect, while a little overweight reduced the risk of becoming pregnant.

Smoking seems to cause the most failure: smoking more than one cigarette a day reduces more than a third of the chances of being a mother.

Dr. Bea Lintsen said that a combination of a woman who is difficult to have children, is overweight, aged 36, drinks at least 4 cups of coffee a day, smokes more than 1 cigarette a day and drank at least 3 glasses of alcohol The week will only have 5% chance to be a mother naturally.

Professor Bill Ledger, a leading obstetrician in the UK, said caffeine is "toxic" to women's eggs and recommends that people who want to give birth should limit tea consumption as well as coffee.

He added that caffeine could also destroy sperm, meaning that men should consider the amount of tea and coffee they drink each day.