Being overweight or obese in adulthood, gaining weight in adulthood, and being underweight at aged 18 years were associated with a modest reduction in fecundity in a study of 1,950 women currently attempting pregnancy. Height, current weight, and weight at aged 18 years were self-reported and every 3 to 6 months thereafter, participants reported the current duration of their pregnancy attempt. Study results included:
• For every 5-kg increase in body weight from age 18 years, current duration of pregnancy attempt increased by 5%.
• Compared with women who maintained weight, the adjusted median current duration was 0.5 months shorter in those who lost weight, 0.3 months longer for those who gained 4 to 9.9 kg and 10 to 19.9 kg, and 1.4 months longer for those who gained 20 kg or more.
• Being underweight at aged 18 years was associated with a longer current duration of pregnancy attempt compared with normal weight women.
• Being overweight or obese at aged 18 years was not associated with fecundity.
Citation: Gaskins AJ, Rich-Edwards JW, Missmer SA, Rosner B, Chavarro JE. Association of fecundity with changes in adult female weight. Obstet Gynecol. [Published online ahead of print September 3, 2015]. doi: 10.1097/AOG.0000000000001030.