If you combine the point on what constitutes a normal count and the point on the hostile environment, you get the answer. Also - related point - for IVF, they

If you combine the point on what constitutes a normal count and the point on the hostile environment, you get the answer. Also - related point - for IVF, they have very strict quality standards. Using the measurement standards for IVF would consider 15% "normal forms" as an acceptable level.