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A. Ongoing pregnancy rate after fresh transfer B. Cumulative live birth rate C. Rates of ovarian hyperstimulation syndrome (OHSS) and early pregnancy loss D. Fertilization rate

A. Recombinant FSH directly stimulates granulosa cells to produce more progesterone via the delta-4 (D4) pathway B. HCG-derived LH activity in hp-HMG activates theca cells via the delta-5 (D5) pathway, diverting pregnenolone away from progesterone synthesis C. HP-hMG causes more rapid follicular maturation, shortening the window for progesterone accumulatio D. Recombinant FSH has greater bioavailability, leading to stronger FSH receptor activation and higher progesterone output

A. FSH assay interference was minimal for all preparations; LH assay interference was significant for all B. FSH assay interference was massive for all preparations; LH assay interference was significant only for preparations containing an LH analog C. Both FSH and LH assay interference were significant for all preparations D. FSH assay interference was significant only for recombinant preparations; urinary preparations showed minimal interference

A. A significantly higher number of retrieved oocyte B. A reduced incidence of ovarian hyperstimulation syndrome (OHSS) C. A significantly improved high-quality embryo rate D. A significantly higher live birth rate

A. Flexible rLH supplementation, initiated only when serum LH falls below 1.2 mIU/mL B. Luteal-phase-only rLH support following oocyte retrieval C. Late follicular-phase rLH supplementation beginning on stimulation day 6 or late D. Continuous rLH supplementation initiated at the start of stimulation

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