CHANGES IN THE DENSITY AND PROGESTERONE CONTENT OF LUTEAL TISSUE IN THE EGYPTIAN BUFFALO DURING THE OESTROUS CYCLE
| العنوان: | CHANGES IN THE DENSITY AND PROGESTERONE CONTENT OF LUTEAL TISSUE IN THE EGYPTIAN BUFFALO DURING THE OESTROUS CYCLE |
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| المؤلفون: | François B. Sakla, A. S. El-Sheikh, Safaa O. Amin |
| المصدر: | Journal of Endocrinology. 39:163-171 |
| بيانات النشر: | Bioscientifica, 1967. |
| سنة النشر: | 1967 |
| مصطلحات موضوعية: | Male, Estrous cycle, endocrine system, medicine.medical_specialty, Buffaloes, urogenital system, Endocrinology, Diabetes and Metabolism, Organ Size, Luteal phase, Biology, Endocrinology, Estrus, Corpus Luteum, Pregnancy, Internal medicine, medicine, Animals, Female, Progesterone, hormones, hormone substitutes, and hormone antagonists, reproductive and urinary physiology |
| الوصف: | SUMMARY The histological and functional changes of 31 corpora lutea of Egyptian buffaloes during the various phases of the oestrous cycle were studied. The volumes of the corpora lutea were calculated, the volume per cell, the cell volume and the volume of the intercellular spaces were estimated from transverse serial sections stained with haematoxylin and eosin, Mallory's triple stain or van Gieson's stain. The nuclear volumes were also determined and the cytoplasmic volume was calculated. The progesterone content was estimated using column absorption chromatography and a counter-current distribution system. It was concluded that the luteal cells increase both in volume and in number due to mitosis. The luteal cells decrease in volume after the 15th day after ovulation, the cells lose their distinct outlines in the regressive stage and disappear completely in the corpus albicans. There was a parallel increase in luteal cell volume and progesterone content until the 15th post-ovulatory day followed by a decrease in the regressive phase and disappearance of the hormone in the corpus albicans. A highly significant correlation (r = +0·875) was found between the progesterone content and the cytoplasmic volume. Progesterone concentration/g. luteal tissue increased from the corpus haemorrhagicum to the mature corpus luteum, decreased in the regressive corpus luteum and completely disappeared in the corpus albicans. |
| تدمد: | 1479-6805 0022-0795 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9d3442d3c523acd9278e3d595a068404Test https://doi.org/10.1677/joe.0.0390163Test |
| رقم الانضمام: | edsair.doi.dedup.....9d3442d3c523acd9278e3d595a068404 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 14796805 00220795 |
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