Using a tiny, spherical glass lens sandwiched between two brass plates, the 17th-century Dutch microscopist Antonie van Leeuwenhoek was the first to officially describe red blood cells and sperm cells ...

Scientists have long questioned whether human papillomavirus, or HPV, infections in men could affect their sperm health and fertility. Now, an early study finds that high-risk HPV infections might be ...

Ultrastructure expansion microscopy of murine male germ cells reveals the fine molecular structures of centrioles (shown in the enlarged image). DNA is stained in blue, and the chromosome axis in red.

(CNN) -- Scientists have long questioned whether human papillomavirus, or HPV, infections in men could affect their sperm health and fertility. Now, an early study finds that high-risk HPV infections ...