It depends on the fertilization rate, if it has been correct (≥65%) it would not be strictly necessary. However, today, the ICSI technique is indicated in almost all cycles to avoid total fertilization failures with conventional IVF, which occur in 5-10% of the cases (data from the Spanish Fertility Society Registry - Registro Sociedad Española de Fertilidad, SEF 2016).
I have finished my first IVF cycle and the result was negative, is it time to move to ICSI or should I try again with IVF?
By María Eugenia Ballesteros Moffa M.D., M.Sc., B.Sc. (gynecologist).
Last Update: 01/14/2019
María Eugenia Ballesteros Moffa
M.D., M.Sc., B.Sc.
Bachelor's Degree in Medicine and Surgery from the University of Zaragoza, specialized in Obstetrics and Gynecology. She has a long career as a specialized gynecologist in assisted reproduction and is also an associate professor in the Department of Surgery, Gynecology and Obstetrics at the University of Zaragoza.