A step toward lab‑grown sperm: Scientists turn stem cells into early sperm cells in a mini‑testis

About 9% of men of reproductive age in the United States experience fertility problems.

One of the many causes of male infertility is a failure in germline development, the process by which embryonic cells develop into sperm or eggs.

Finding treatments has been challenging because there are no laboratory models that accurately mimic how sperm develop, but a recent study brings us a step closer. ...