Single embryo transfer also known as elective single embryo transfer ( eSET) is a procedure in which one single embryo is selected from the cohort of multiple embryos made. This is helpful in avoiding the risk of multiple pregnancy and it’s complications like preterm birth and low birthweight babies. By using technologies like computerised grading of embryos, video based grading of embryos using embryoscope, or genetictesting of embryos using Preimplantation Genetictesting for aneuploidy (PGTA) or Non-invasive chromosomal screening of embryos NICS one can select the best embryo for transfer giving maximum success rate , minimum miscarriage rate and a singleton pregnancy .