The patient, a 42-year-old man, underwent spermatologic and genetic analysis during an infertility evaluation solicited by him and his partner after miscarriage. He and other male members of his ...

Mutations that abolish the activity of luteinizing hormone are rare; they have been reported in five men and one woman. 1–5 The phenotypes of these persons suggest that luteinizing hormone is not ...

Male infertility is on the rise, with significant declines in sperm quantity and quality occurring across the human population worldwide in the past two decades. The reason for this is poorly ...

A startup out of Utah, Paterna Biosciences, says it has successfully grown functional human sperm in a lab and used the sperm to make visibly healthy-looking embryos. The technique could eventually ...

The creation of sperm in mammals, known as spermatogenesis, is critically impacted by temperature. A very small increase results in a significant reduction in the little swimmers. Peto’s paradox ...