Passage of the Sperm and the Penetration of the Egg in Mammals
β Scribed by AUSTIN, C. R.; BRADEN, A. W. H.
- Book ID
- 109571963
- Publisher
- Nature Publishing Group
- Year
- 1952
- Tongue
- English
- Weight
- 318 KB
- Volume
- 170
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/170919a0
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Sheep eggs were obtained at appointed times from 4 to 16 hours after ovulation and examined for evidence of penetration by spermatozoa. The following observations were made: ( 1 ) The fertilizing spermatozoon makes a curved slit in the zona as a result of traversing it. The slit seems to be an open
## Abstract (C57BL/10 Γ CBA)F~1~ mouse eggs were incubated in vitro with either F~1~ or outbred TO sperm for 15 minutesβ6 hours. Upon removal from the sperm suspensions some eggs were treated with pronase to remove zonae and then cultured, while the remainder were simply cultured to allow a compari