Pre-Gestational Changes in the Giant Fruit Bat (Pteropus Giganteus), With Special Reference to an Asymmetric Endometrial Reaction.

In the bicornuate, uniparous fruit-bat (Pteropus giganteus) an asymmetric endometrial reaction occurs. Immediately following ovulation and while the morula is still descending the tube, the glands of the uterine horn adjacent to the ovulating ovary become strikingly modified. The opposite horn remains comparatively inactive. The glandular activity occurs at the extreme tubal end of the cornu only and implantation always occurs there. The possibility of nervous as well as humoral control of the endometrial reaction was investigated. No evidence of this was found in the ovary. Endometrial innervation is described.