How sperm get into the zona

Before it can fertilize an egg, a sperm has to bind to and bore through an outer egg layer known as the zona pellucida. Researchers now identify the protein in the zona pellucida that sperm latch onto. The zona pellucida protects the egg and the early embryo before implantation.

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Bring Nature To Your Floors

Article written by Bamboo Flooring Facts                 It is not the many cinematographers and set designers that certain materials to give officers and vibes for a scene. The thing gives […]

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