On the Formation and Regression of Corpus Luteum in the Northern Fur Seal Ovaries
نویسندگان
چکیده
Corpus luteum and the process of its formation in fur seal ovary, collected around the Robben Island in the Okhotsk Sea, were studied. The regressive phases of follicle and courpus luteum were examined histologically. There are two kinds of corpus luteum, one is formed inside the vesicular follicle after ovulation, the other is formed outside the follicle without ovulation. The former is the true corpus luteum and the latter is the accessory corpus luteum or corpus atreticum. The function of corpus luteum graviditatis degenerates in the last stage of pregnancy. Corpus albicans originated from the true corpus luteum is distinguished from the corpus atreticum clearly. The former exists for about two years in the ovary and then disappears, but the latter vanishes shortly.
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