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In response to previously published evidence from monkeys, this study examined the influence of the degree of luteinizing hormone (LH) suppression during the follicular phase of the stimulation cycle, upon cryopreserved embryo survival and development. The LH concentration of the mid-follicular phase was assessed in 250 in-vitro fertilization (IVF) cycles treated with gonadotrophin-releasing hormone analogue (GnRHa) and either purified follicle stimulating hormone (FSH) or human menopausal gonadotrophin (HMG), and was related to the performance of cryopreserved embryos in 351 subsequent embryo transfer cycles. Rates of embryo survival, embryo development rates, implantation rates, and pregnancy rates were examined with respect to the LH concentration recorded in the mid-follicular phase. In contrast to experimental evidence from other primates, there was no significant influence of the follicular phase LH concentration upon any of the parameters examined.

human reproduction

Effect of profound suppression of luteinizing hormone during treatment with gonadotrophin-releasing hormone analogue and purified follicle stimulating hormone upon development of cryopreserved embryos