Male infertility, depending on what is causing it, can be classified into the following types:
- Pre-testicular or endocrine factors: the development and/or the testicular function are compromised due to hormonal irregularities.
- Testicular factors: direct damage to the testes.
- Post-testicular factors: alterations in the seminal vesicles, which are responsible for the exit of spermatozoa from the testes.
- Sperm-related factors: abnormalities of the sperm that affect sperm quality directly.
By Ana María Segura Paños MD, MSc (andrologist), Emilio Gómez Sánchez BSc, PhD (senior embryologist), Zaira Salvador BSc, MSc (embryologist) and Marie Tusseau (invitra staff).
Last Update: 05/29/2017