Levels of a hormone when measured in hair can significantly predict the likelihood of pregnancy in women undergoing in vitro fertilisation (IVF) treatment. A study found that elevated levels of cortisol measured in hair were associated with almost a third less chance of conceiving.

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Levels of a hormone when measured in hair can significantly predict the likelihood of pregnancy in women undergoing in vitro fertilisation (IVF) treatment. A study found that elevated levels of cortisol measured in hair were associated with almost a third less chance of conceiving.