"While the genetic programmes in the early stages of spermatogenesis are very similar among mammals, in later stages they differ greatly; that means that the rapid evolution of the testicle is a ...

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 ...