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In vitro fertilization‐embryo transfer (ivf‐et) in the united states: 1990 results from the ivf‐et registry

InfertilityDevelopmental BiologyFertilityMedicineReproductive HealthGynecologyMaternal HealthVitro Fertilization‐embryo TransferReproductive MedicineIvf‐et RegistryEmbryo TransferPublic HealthUnited StatesIn Vitro FertilizationReproductive TechnologyEmbryologyHuman ReproductionReproductive Biotechnology