The World Health Organization (WHO) published an update of the Laboratory Manual for Semen Testing and Processing in 2021 (the sixth edition). In spite of this, the most common practice is to continue to follow the criteria of the fifth edition (corresponding to 2010).
Thus, when analyzing the sperm vitality of a semen sample, it is accepted that if there are more than 58% of live spermatozoa, the semen sample is normal (for the vitality parameter).
On the other hand, if the percentage of live spermatozoa is less than 58%, the sperm vitality is altered. This sperm alteration is called necrozoospermia.
Read the full article on: Which Methods Are Used to Assess Sperm Vitality? ( 39).
By Álvaro Martínez Moro B.Sc., M.Sc. (embryologist), Andrea Rodrigo B.Sc., M.Sc. (embryologist), Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Sergio Rogel Cayetano M.D. (gynecologist) and Cristina Algarra Goosman B.Sc., M.Sc. (psychologist).
Last Update: 01/14/2025
