Teratozoospermia is defined as having abnormal sperm morphology. It is a common cause of male infertility and can be classified into three grades depending on the severity:
- Mild teratozoospermia
- Between 10% and 14% of the sperm have a normal morphology.
- Moderate teratozoospermia
- Only 5-10% of the sperm have an abnormal shape.
- Severe teratozoospermia
- Less than 5% of the sperm have a normal morphology.
It should be noted that this definition has been created using the Kruger's strict criteria, according to which a man has teratozoospermia if over 85% of the sperms present in his ejaculate have an abnormal morphology.
Read the full article on: What Is Teratozoospermia? – Causes & Treatment ( 98).
By Andrea Abbad BSc, MSc (embryologist), José Antonio Sánchez Férez BSc (embryologist), Zaira Salvador BSc, MSc (embryologist) and Sandra Fernández BA, MA (fertility counselor).
Last Update: 04/05/2018
