Elective single embryo transfer in women less than age 38Â years reduces multiple birth rates, but not live birth rates, in United States fertility clinics

Our study showed a marked and linear reduction in multiple birth rates, and important, little to no effect on clinic-level live birth rates with increasing rates of eSET supporting the growing evidence that eSET is effective in decreasing the high multiple birth rates associated with IVF and suggests that eSET should be used more frequently than is currently practiced.