Eggs urge sperm to swim up and see them

Vines, Gail
April 1991
New Scientist;4/13/91, Vol. 130 Issue 1764, p21
Comments on the first evidence of 'sperm-egg communication' in mammals which has been claimed by biologists in the US and Israel. Release of a chemical by eggs which encourages the sperm to swim towards them; Study by Dina Ralt at the Weizmann Institute of Science in Rehovot, Israel and others; Follicular fluid; In vitro fertilization; Variance in quality of sperm.


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