Functional human sperm in a lab.

Functional human sperm in a lab. “Growing functional human sperm entirely outside the body.” Little by little we’re living in an era where humans are taking control over biology. In this example, they were able to coax stem cells into sperm cells one chemical signal at a time. Paterna says it proved viability by using the lab-grown sperm to fertilize human eggs and form embryos, with early results comparable to standard IVF. ~ learn more