. Text-fig. 10. Morphological variation in accessory corpora lutea. See text. They fall into two main groups; the larger, having developed from ruptured follicles, show a stigma and small corona, but the smaller are formed from unruptured follicles. A female fin whale 73 ft. in length taken on 8 February 1954 had recently ovulated, but no products of conception were seen in the uterus. There were three small corpora lutea in one ovary, one of which, 23-5 mm. in diameter, had ovulated, and two measuring 13 and 15 mm. (Text-fig. log, h) had developed from unruptured follicles. The appearance of
. Text-fig. 10. Morphological variation in accessory corpora lutea. See text. They fall into two main groups; the larger, having developed from ruptured follicles, show a stigma and small corona, but the smaller are formed from unruptured follicles. A female fin whale 73 ft. in length taken on 8 February 1954 had recently ovulated, but no products of conception were seen in the uterus. There were three small corpora lutea in one ovary, one of which, 23-5 mm. in diameter, had ovulated, and two measuring 13 and 15 mm. (Text-fig. log, h) had developed from unruptured follicles. The appearance of the luteal cells is similar in all three. They are derived from the membrana granulosa because theca interna cells can be seen at the periphery of the gland 5-2
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