Adolescent / Prospective studies / Pregnancy / Humans / Fertility and Sterility / Female / Young Adult / Embryo Transfer / Clinical Sciences / Adult / Public health systems and services research / IntraUterine Devices / Intrauterine Insemination / Female / Young Adult / Embryo Transfer / Clinical Sciences / Adult / Public health systems and services research / IntraUterine Devices / Intrauterine Insemination