Oligospermia / Asthenospermia / Teratospermia

By RRM Academy Reviewed by Dr. Naomi Whittaker, MD, Board-Certified OBGYN, MIGS, NFPMC, FCI Updated April 18, 2026

Reduced sperm parameters defined by WHO reference values:

• Oligospermia: Sperm concentration <16 million/mL
• Asthenospermia: Progressive motility <30%
• Teratospermia: Normal morphology <4% (Kruger strict criteria)

Often co-exist; combined deficits are termed oligoasthenoteratospermia (OAT syndrome).

This content is for educational purposes only and does not constitute medical advice. Consult an RRM clinician or healthcare provider for guidance specific to your situation.