1.809 
Male sterility due to a sperm factor refers to alterations in the spermatozoa. When it is caused by a low number of sperm in the ejaculate, we distinguish between:
- Oligozoospermia
- when there are between 15 million/ml and 100,000 spermatozoa/ml.
- Cryptozoospermia
- if there are less than 100,000 spermatozoa/ml.
- Azoospermia
- no sperm in the ejaculate.
Read the full article on: List of Sperm Disorders that Cause Male Infertility ( 38).
By Concha Leal Cariñena M.D. (gynecologist), Marta Barranquero Gómez B.Sc., M.Sc. (embryologist), Rebeca Reus BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 07/27/2020
