Dr. Smurf revealed the startling reality of the male reproductive system and what happens when people don't release sperm in ...

A new study shows that lab-grown sperm cells can be derived from stem cells. July 9, 2009 — -- The face of infertility-- in literature, in the media, in advocacy groups -- is so predominantly ...

As we age, our cells accumulate DNA mutations. If any of these mutations confer a growth advantage to a self-renewing or long-lived progenitor cell, its lineage can expand. The progenitor cells that ...

Research into how a father’s choices — such as diet, exercise, stress, nicotine use — may transfer traits to his children has become impossible to ignore. The standard sperm-meets-egg story posits ...

This article was reviewed by Darragh O’Carroll, MD. After a vasectomy, sperm production doesn’t stop — but sperm can’t travel through the vas deferens anymore. Instead, your body reabsorbs the sperm ...