Conclusion
In summary, single blastocyst transplantation seems to be the best choice for all maternal ages to greatly reduce adverse neonatal outcomes (twin birth, preterm birth, low birth weight and SGA), although slightly compromising to increasing in monozygotic twins and miscarriage and reducing in live birth. Doctors should select the most suitable transplantation strategy based on the patient’s situation. However, with advances in reproductive medicine, single blastocyst transplantation may be the optimal choice for women who desire to get pregnant and deliver a healthy baby.