1. Stratified squamous epithelium with beginning surface cornification.

2. Rising levels of estrogen induce the "cornification" that is characteristic of smears examined during estrus.

3. Cornification index(CI) of vaginal cell and uterus index of castrated mice were also counted.

4. Cornification index(CI) of vaginal cell and uterus index of castrated mice were counted.

5. Transitional corneocytes are almost absent suggesting that the process of cornification is very rapid.