Long-Term Contraception in a Single Shot (IMAGE)

California Institute of Technology

Long-Term Contraception in a Single Shot

Caption

Caltech biologists have developed a nonsurgical method to deliver long-term contraception to both male and female animals with a single shot. The technique -- so far used only in mice -- holds promise as an alternative to spaying and neutering feral animals. Here, an antibody bound to the egg zona pellucida (indicated in blue), a binding site for sperm, results in infertility.

Credit

Bruce Hay/Caltech

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