Menstruation and fertility following anorexia nervosa

Weight requirements for return of menstruations in teenage girls with eating disorders, weight loss and secondary amenorrhoea

“…The present investigation appears to confirm previous observations in patients with ED that menstruations return at a weight which, on average, is somewhat below that of the population mean (16)(17)(18). Indeed, in a number of studies, an average weight around 90% of an estimated "normal" bodyweight for height and/or age has been reported at return of menstruation (17)(18)(19)(20)(21)(22)(23)(24)(25).…”

“…Indeed, in a number of studies, an average weight around 90% of an estimated "normal" bodyweight for height and/or age has been reported at return of menstruation (17)(18)(19)(20)(21)(22)(23)(24)(25). Individual variation is, however, considerable and when the populations studied reached an average of 90% of the estimated "normal" bodyweight, 6-44% remained amenorrhoic (18,19,(21)(22)(23)(25)(26)(27), indicating that a higher target is needed for some individuals.…”

Eating Disorders and Menstrual Dysfunction in Adolescents

“…Finally, there was no significant difference in body weight, body mass index (BMI), and % body fat between patients who had a return of menstrual function with those who did not. A retrospective study by Shomento and Kreipe 45 found similar results, with the return of menses occurring at 92% of IBW.…”

Eating disorders in adolescent girls*

“…13 Weight targets and ranges are established using ideal bodyweight (IBW) tables for age (National Health Statistics standards), estimated fat percentages (using calipers or Frisch tables 27 ) and BMI. A number of investigators have pointed out mean thresholds associated with the re‐establishment of menses in girls with AN, based on estimates of percentages of body fat using height and weight measurements, 27 percentage of ideal bodyweight 28 and BMI. 29 However, girls may remain amenorrheic despite attaining the necessary weight for height, because of stress and ongoing preoccupation with food, dieting and weight.…”