Treatment Outcome / Infertility / Pregnancy / Humans / Fertility and Sterility / Female / Male / Embryo Transfer / Boston / Clinical Sciences / Embryonic Development / Adult / Public health systems and services research / Oocytes / Pregnancy Rate / Case Control Studies / Female / Male / Embryo Transfer / Boston / Clinical Sciences / Embryonic Development / Adult / Public health systems and services research / Oocytes / Pregnancy Rate / Case Control Studies