IVF is being used too soon by some couples struggling to start a family, researchers have warned.

They said that the risks of complications meant the decision to begin fertility treatment should not be taken lightly and there were many occasions where couples would be better continuing to try naturally.

Professor Siladitya Bhattacharya, chair in obstetrics and gynaecology at the University of Aberdeen, said: "There are situations where IVF is probably being used too soon by some couples who would have conceived on their own.

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"In couples where the woman is young, or where the duration of infertility is short, awaiting spontaneous conception by doing nothing for two to three years is a reasonable option.

"We have to be more careful about who we treat and when we treat. The decision should not be taken lightly."