Diet-induced menstrual irregularities: effects of age and weight loss.
Luteinizing hormone (LH), follicle-stimulating hormone (FSH), estradiol (E2), and progesterone (P) levels were followed in 22 healthy, normal-weight women (aged 19 to 30 years) for a control and a diet menstrual cycle. During the diet cycle, they lost weight on a high-carbohydrate, vegetarian, 1000-calorie diet. During the control cycle, luteal phase in 5 subjects failed to meet the criteria: length greater than or equal to 8 days and P maximum greater than or equal to 6 ng/ml; during the diet cycle, the number of subjects who failed to meet these criteria was 14 (chi-square test, P less than 0.02). No evidence of follicular phase disturbance was observed during the diet. Age and weight loss significantly changed parameters of the diet luteal phase: length and area under LH, FSH, E2, and P curves. Generally, hormone plasma concentrations during the luteal phase were lower the younger the age and the greater the weight loss.
D000328:Adult; D000375:Aging / Q000502:physiology*; D001835:Body Weight; D004038:Diet, Reducing / Q000009:adverse effects*; D014676:Diet, Vegetarian; D004040:Dietary Carbohydrates / Q000008:administration & dosage; D002149:Energy Intake; D004958:Estradiol / Q000097:blood; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D005498:Follicular Phase; D006801:Humans; D008183:Luteal Phase; D007986:Luteinizing Hormone / Q000097:blood; D008599:Menstruation Disturbances / Q000097:blood / Q000209:etiology*; D011374:Progesterone / Q000097:blood
D004040:Dietary Carbohydrates; D011374:Progesterone; D004958:Estradiol; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone