| Issue 69
How does the body avoid multiple sperm fertilizing an egg?
You shall not pass: discover how the protein coating around an egg cell ‘zips up’ after fertilization to stop more sperm from entering.
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You shall not pass: discover how the protein coating around an egg cell ‘zips up’ after fertilization to stop more sperm from entering.
| Issue 69
How does the body avoid multiple sperm fertilizing an egg?