Dr. Peter Schlegel, Chairman of Weill Cornell Medicine Urology, was featured on a National Geographic segment regarding male fertility.
In this clip, Dr. Schlegel discusses average sperm counts for men currently, and how this figure may have changed in recent decades. Dr. Schlegel's lab analyzes a semen sample from a patient, to show the appearance and quantity of sperm in the patient's sample.
You can view this segment by visiting this link.
You can learn more about Dr. Peter Schlegel by visiting his profile here.