Ovulation rate in adolescents with type 1 diabetes mellitus
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Objective: To study ovulation in adolescents with type 1 diabetes (T1D) and the effect of hemoglobin A1c (HbA1c) levels on their ovulatory function. Design: Prospective investigation. Setting: Academic research institute. Patient(s): Adolescents with T1D (n ¼ 31) and healthy girls (n ¼ 52). Intervention(s): Ovulation assessed through the measurement of salivary progesterone (days 13, 18, 23, and 28 of each cycle). Main Outcome Measure(s): Proportion of ovulatory cycles. Result(s): Atotal of 168 and 281 menstrual cycles were studied in the T1D and control girls, respectively. Metabolic control was defined as optimal if HbA1c was <7.5%. The proportion of ovulatory cycles was similar in the TID and control groups (34.5% and 36.3%, respectively). Regression analyses showed that the presence of T1D did not have a statistically significant effect on the ovulatory rate. However, more ovulatory cycles were observed in girls with T1D who had optimal metabolic control compared with those who had insufficient control (51.3% vs. 29.4%). Conclusion(s): In adolescent girls, T1D did not affect the rate of ovulation. A higher ovulatory rate was observed in those with optimal control compared with those with insufficient metabolic control, but a substantial proportion of ovulatory cycles were still observed in patients with higher HbA1c levels.
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