Scientists find new variations among sperm cells

The behavior of sperm cells is due, in part, to the individual DNA make-up of these cells, rather than only to the genetics of males, finds a team of scientists. Its results, which provide a new understanding of the competition ...

Sterile mice produce rat sperm

Researchers generated rat sperm cells inside sterile mice using a technique called blastocyst complementation. The advance appears August 4 in the journal Stem Cell Reports.

The black box behind embryonic development

DNA regulation is a critical process in a cell that allows it to fulfill its function. This process is key during pregnancy, when embryonic cells must develop into all cell types needed to form an embryo. An international ...

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