Smoking reduces IVF Pregnancy Rates

In a study about to be published in the journal Human Reproduction, infertile women who smoke were found to have lower pregnancy rates and higher miscarriage rates during treatment with in vitro fertilization - IVF.

Smoking reduced IVF pregnancy rates

Danish researchers looked at 8,457 women aged 20 to 40 who had had in vitro fertilization treatment. The patients were divided into four groups, depending on the cause of each couple's fertility problems; male fertility disorder, fallopian tube problems, other clinical explanations - such as polycystic ovaries or endometriosis, or unexplained fertility problems.

Overall, the live birth rate for smokers was 28% lower than non-smokers. Among women with unexplained infertility, the live birth rate was a third lower for smokers, at 13% compared to 20% for non-smokers. This is the same effects as would be seen for women who were ten years older. In other words, a 35 year old woman who smokes would have the pregnancy rate a 45 year old.

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