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Biology of Reproduction, Vol 12, 477-482, Copyright © 1975 by Society for the Study of Reproduction

Labeling the Zona Pellucida of the Mouse Oocyte

E. F. OAKBERG 1, and PATRICIA D. TYRRELL 1

1 Biology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830


Young adult 101 x C3H female mice, 8 weeks old, were given two injections of 50 µCi of N(acetyl-3H)D-glucosamine 24 h apart and killed 4 days, 1 week, and at weekly intervals thereafter up to 10 weeks after injection. The appearance of labeling in late stage 3 of follicular development coincided both in time and place with the first visible evidence of zona formation. Follicle stages 4-8 all were heavily labeled. As these older oocytes were either ovulated or underwent atresia, they were replaced by oocytes with unlabeled zonae. This progression allowed an estimate of about 5 weeks for development of a stage 3 follicle (and oocyte) into a mature Graafian follicle. With this technique it is likely that some new insights may be obtained on the dynamics of follicular growth, atresia, and ovulation.

Accepted on December 2, 1974




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Copyright © 1975 by the Society for the Study of Reproduction.