Body mass index-associated differences in response to ovulation induction with letrozole

 Posted by Chantel M. Research contributed by the US National Library of Medicine National Institutes of Health

The prevalence of childbearing age obesity is wide spreading in US, approximately, 50% of them are either overweight [body mass index (BMI) 25-29.9 kg/m(2)] or obese (BMI ≥ 30 kg/m(2)).
 Body mass index-associated differences in response to ovulation induction with letrozole
In the study to o compare occurrence of pregnancy among obese (body mass index [BMI] ≥30) and nonobese (BMI <30), infertile women undergoing ovulation induction with the aromatase inhibitor letrozole followed by intrauterine insemination (IUI), posted in PubMed, showed that 90 women underwent 180 letrozole-IUI cycles. Conception of pregnancy occurred in 10.4% and 18.2% of the BMI <30 and BMI ≥30 groups, respectively. Using BMI as a continuous variable showed a pregnancy odds ratio of 1.093 (confidence interval 1.008-1.184) for each unit increase in BMI. Incidence of miscarriage, multiple births, number of mature follicles, and presence of LH surge were similar between groups.
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