"Our study findings are supportive of the concept that increased female BMI may have a negative influence on the early pregnancy outcome. We found a significant positive correlation between the BMI and first-trimester pregnancy losses and anembryonic miscarriages. There were also significantly more first-trimester miscarriages in obese women than in normal-weight or overweight women with recurrent miscarriage."
January 1, 1970
https://en.wikiquote.org/wiki/Miscarriage