When a semen sample contains less than 100,000 sperm per mL of ejaculate, it is considered a cryptozoospermic sample. According to the World Health Organization (WHO) reference values, a semen sample must contain more than 15 million sperm per mL of ejaculate.
Normal sample and sample with cryptozoospermia
By Concha Leal Cariñena (gynecologist), Rebeca Reus BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 07/28/2020