Spermatogenesis in the testicle is controlled by a finely coordinated, complex interplay of the activity of different genes -- also known as gene expression. Hitherto the understanding of these ...

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 ...

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 ...

Your testicles are constantly producing sperm but a full regeneration cycle can take over 2 months. You produce sperm every day, but a full sperm regeneration cycle (spermatogenesis) takes a little ...

Paterna Biosciences says it has determined the set of instructions needed to turn sperm-making stem cells into "normal, mature" sperm.