sperm cells agglutination under microscope.
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spermspermsattackedhumanimmunesystemforeign bodyanimationCGIcervixwombuterusfallopian tubesphagocytewhite blood cellInside the Human Bodyepisode 1creationBBCBBC iPlayerUnited KingdomBritish TVBritish TV ShowsWatch UK TV OnlineWatch British TV OnlineWatch British TV Shows OnlineSperm attacked bywoman's immune systemBBC Inside the Human Body