Figure 1.
Serum estrogen concentration in women at time of the LH surge in natural conception cycles compared to autologous ART conception and oocyte donation. E2, estradiol; FET, frozen embryo transfer; OD-FET, oocyte-donation FET.

Serum estrogen concentration in women at time of the LH surge in natural conception cycles compared to autologous ART conception and oocyte donation. E2, estradiol; FET, frozen embryo transfer; OD-FET, oocyte-donation FET.

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