Abnormal implantation after fresh and frozen in vitro fertilization cycles
In autologous in vitro fertilization cycles resulting in a positive pregnancy test, fresh blastocyst embryo transfers had the lowest overall risk of abnormal implantation compared to frozen and non-blastocyst transfers.
Volume 107, Issue 5, Pages 1153–1158
Erica T. Wang, M.D., M.A.S., Anupama S.Q. Kathiresan, M.D., Catherine Bresee, M.S., Naomi Greene, M.P.H., Ph.D., Carolyn Alexander, M.D., Margareta D. Pisarska, M.D.
Fresh blastocyst transfers had the lowest overall risk of abnormal implantation but a higher risk of ectopic/heterotopic pregnancy. Although embryo cryopreservation is indicated in certain treatment cycles, elective embryo cryopreservation may not be the optimal strategy to adopt for all cycles.