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Abstract
It has been generally assumed that blood spots in eggs are the result of hemorrhaging from small blood vessels of the stigma which are ruptured at the time of ovulation. Nalbandov and Card (1944) attribute blood spot formation to hemorrhages in the space between the follicular wall and the vitelline membrane prior to ovulation. These workers observed no active intrafollicular hemorrhages in laparotomized hens and no active hemorrhage at the time of ovulation. The observation of the occurrence of an intrafollicular hemorrhage and subsequent blood spot formation will be described in this paper.A laparotomy was performed on an anaesthetized hen shortly after oviposition for the purpose of observation of the ovulatory process by a group of students. The follicle of impending ovulation was observed frequently. There were no recognizable indications at first that ovulation was to occur shortly. Approximately one minute before ovulation the small blood vessels of the…
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