A grayscale electron micrograph shows hundreds of sperm cells stuck together
Antibodies Stop Sperm in Their Tracks
Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.
Antibodies Stop Sperm in Their Tracks
Antibodies Stop Sperm in Their Tracks

Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.

Engineered antibodies trap and immobilize human sperm in the reproductive tract of female sheep, paving the way for possible use as a nonhormonal contraceptive in people.

ABOVE: B. Shrestha et al. Sci Transl Med, 2021
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