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Is IMSI possible with lazy sperm?

By Marta Barranquero Gómez B.Sc., M.Sc. (embryologist).
Last Update: 02/17/2025

It would be possible to perform IMSI when the male seminal sample presents asthenozoospermia, that is, problems in sperm motility, as long as it also presents alterations in morphology.

The main objective of IMSI is to select the spermatozoa with the best morphology. To select those spermatozoa with progressive motility, traditional ICSI is sufficient. Therefore, if there are only slow sperm in the ejaculate, IMSI would not provide any extra benefit.

 Marta Barranquero Gómez
Marta Barranquero Gómez
B.Sc., M.Sc.
Embryologist
Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH).
License: 3316-CV
Embryologist. Graduated in Biochemistry and Biomedical Sciences by the University of Valencia (UV) and specialized in Assisted Reproduction by the University of Alcalá de Henares (UAH) in collaboration with Ginefiv and in Clinical Genetics by the University of Alcalá de Henares (UAH). License: 3316-CV.