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Ovarian Response to Purified FSH in Infertile Women with Long‐standing Hypogonadotrophic Hypogonadism

EDITORIAL COMMENT: We accepted this paper to illustrate an important point, namely that purified FSH preparations may not be appropriate for ovulation induction in ‐women lacking adequate levels of endogenous luteinizing hormone. Furthermore, if these preparations are used then reliance on oestradiol determinations alone may lead to inappropriate conclusions about the number of preovulatory follicles. However, there is probably a place for preparations of purified FSH in women with high circulating levels of endogenous luteinizing hormone.