We propose that VEGF-A plays a role in the occurrence of OHSS, that the amount of biologically available VEGF-A is modulated by sVEGF-Rs and that different combinations of VEGF-A and sVEGF-R levels might contribute to the severity of OHSS.
Background: To determine whether estradiol-to-progesterone (E 2 /P) ratios at the time of embryo transfer (ET) have an effect on implantation and pregnancy in IVF cycles.
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