Researchers identify regulator of human sperm cells

UCSF researchers have identified an elusive molecular regulator that controls the ability of human sperm to reach and fertilize the egg, a finding that has implications on both treating male infertility and preventing pregnancy.

The making of the male brain (estrogen required)

Territorial behavior in male mice might be linked to more "girl-power" than ever suspected, according to new findings at UCSF. For the first time, researchers have identified networks of nerve cells in the brain that are ...

Possible cause of male infertility linked to structural protein

Mature spermatozoa are characterized by a head, midpiece and a long tail for locomotion. Now, researchers from the University Hospital Bonn (UKB) and the Transdisciplinary Research Unit "Life & Health" at the University of ...

Nucleo-cytoplasmic interaction in seedless cybrid citrus

Male sterility is important for seedless citrus breeding. A long juvenile phase and nucellar polyembryony leads to low efficiency of hybrid breeding in citrus. The Citrus research group in National Key Laboratory for Germplasm ...

How birds become male or female, and occasionally both

The highly unusual "semi-identical" Australian twins reported last week are the result of a rare event. It's thought the brother and sister (who have identical genes from their mother but not their father) developed from ...

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