- Grade 1: there are less than 10 sperm per agglutination and many free sperm.
- Grade 2: each agglutination is made up of 10-50 sperm, but there are free sperm.
- Grade 3: the agglutinations are made up of more than 50 sperm and there are some free sperm.
- Grade 4: all the spermatozoa are agglutinated and the agglutinations are interconnected.
Sperm agglutination is a factor to take into account when assessing possible male infertility problems, as it may be suggestive of the presence of anti-sperm antibodies.
By Neus Ferrando Gilabert B.Sc., M.Sc. (embryologist), Silvia Azaña Gutiérrez B.Sc., M.Sc. (embryologist) and Romina Packan (invitra staff).
Last Update: 02/15/2022