Live-birth rates after HP-hMG stimulation in the long GnRH agonist protocol: association with mid-follicular hCG and progesterone concentrations, but not with LH concentrations.

Simple retrospective logistic regression analysis showed that the mid-follicular exogenous concentrations of human chorionic gonadotrophin (hCG) ( p = 0.027), provided by the HP-hMG preparation, and female age ( p = 0.009) were significantly associated with live-birth rate, while the mid-follicular progesterone concentration ( p = 0.075), the estradiol concentration on last stimulation day ( p = 0.075) and number of embryos transferred ( p = 0.071) were borderline significant.

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