Teratozoospermia or teratospermia occurs when 97% or more of the spermatozoa have some alteration in their morphology. For a man to be considered to have a good seminal morphology, at least 4% of his sperm must have a normal shape.
By Concha Leal Cariñena M.D. (gynecologist), Rebeca Reus BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 07/27/2020