The zona pellucida is a thick extracellular coat that surrounds all mammalian eggs and preimplantation embryos. The zona pellucida supports communication between oocytes and follicle cells during oogenesis; protects oocytes, eggs, and embryos during development, and regulates interactions between ov
The origin and structure of the zona pellucida in the ovarian eggs of teleosts
β Scribed by Chaudhry, H. S.
- Book ID
- 112293266
- Publisher
- Springer-Verlag
- Year
- 1956
- Weight
- 765 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0044-3794
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## Abstract The fine structure of the zona pellucida of mouse unfertilized egg cells and of mouse embryos was investigated. In addition to standard fixation for electron microscopy, fixation with an addition of ruthenium red was used and found to be especially valuable for the purpose of studying t
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