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Morphology of ovarian changes in the garden lizard, Calotes versicolor
Author(s) -
Varma Santosh Kumari
Publication year - 1970
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1051310206
Subject(s) - theca interna , biology , ovulation , yolk , vitellogenesis , follicular phase , lizard , medicine , theca , endocrinology , antral follicle , ovary , follicle , corpus luteum , uterus , ovarian follicle , andrology , oocyte , embryo , microbiology and biotechnology , zoology , hormone , ecology
Ovarian changes during the reproductive cycle of the oviparous garden lizard ( Calotes versicolor ) are described. It ovulates from last week of June to first week of September but most often in July and August when the monsoon occurs. The number of eggs ovulated vary from 10 to 32. After ovulation, the ovaries are reduced in size. From October to May, the ovaries contain small pre‐vitellogenic follicles, which increase in size in June when most of yolk deposition occurs. Several nuclei are seen in the ooplasm of pre‐vitellogenic follicles; they are finally absorbed before yolk deposition starts. Follicular atresia generally occurs in follicles with polymorphic granulosae, in post‐ovulatory ovaries. Presumably interstitial gland cells are formed by the hypertrophy of the theca interna cells of atretic follicles. Pre‐ovulatory follicles have highly vascularized thecae and invaginations of the follicular epithelium. After ovulation, the follicle cells hypertrophy to form the luteal cell mass filling the follicular cavity. Fibroblasts, which appear to arise from the theca interna, invade the luteal cell mass and form septa. Capillaries occur in the luteal cell mass.