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  • Title: Endocrinological studies in two patients with post contraceptive cyclic dysfunction.
    Author: Adamopoulos DA, Loraine JA, Ginsburg J, Loudon NB.
    Journal: Scott Med J; 1972 Aug; 17(8):270-4. PubMed ID: 4642685.
    Abstract:
    Serial assays of urinary estrogens, pregnanediol, follicle-stimulating hormone (FSH), and luteinizing hormone (LH), WERE PERFORMED IN 2 NORMAL women who developed amenorrhea as a result of oral contraceptive use. Case 1, a woman aged 28 with 2 children took Ovulen (mestranol .1 mg and ethynodiol diacetate 1.0 mg) for 25 months followed by a substitution of chlormadinone acetate (.5 mg per day) when she developed increased menstrual irregularity. Following withdrawal of the medication, vaginal bleeding began and lasted 4 days, and she experienced regular cycles for the subsequent 2 years. The second woman aged 21 developed amenorrhea after 17 months' use of Gynovlar (ethinyl estradiol .05 mg and norethistrone acetate 3.0 mg). Amenorrheic for 21 months at the time of investigation, she was given clomiphene citrate for 5 days (50 mg/day). Further treatment with clomiphene and Pergonal (Serono-Rome) was necessary to resume normal cycles and permit conception which led to full term delivery. Estrogen levels were similar to those of the follicular phase of the normal menstrual cycle; however, they rose spontaneously to midcycle levels in case 1 and as a result of clomiphene treatment in case 2. FSH levels were normal but failed to show consistent patterns; LH patterns were highly irregular in both cases. The findings are consistent with the hypothesis that longterm therapy by oral contraceptives may cause irregular cyclic release of gonadotrophins at the hypothalamic level resulting in amenorrhea and anovulation.
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