Higher twin birth rates seen with increasing prepregnancy BMI, ART use

Twin birth rates rose with increasing prepregnancy BMI, and approximately 25% of the association can be explained by assisted reproductive technology use, according to study results published in JAMA Network Open.
“Previous studies from the United States and Denmark have shown an association between obesity and twinning rates, particularly with regard to dizygotic twins,” Jeffrey N. Bone, MSc, biostatistical lead in the department of biostatistics at the BC Children’s Hospital Research Institute and the department of obstetrics and gynecology at the BC Children’s and Women’s

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