• R K Parshad

      Articles written in Proceedings – Animal Sciences

    • Effects of aqueous and lipoidal extracts of the wall of preovulatory follicles on the ovary of growing chicks

      R K Parshad G Grewal S S Guraya

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      Effects of continuous intramuscular administration of the lipoidal and aqueous extracts of the wall of the largest preovulatory follicle (3·8–4·0 cm), to chicks from 11 to 29 weeks on alternate days have been studied on the ovarian growth, follicular growth and atresia, and the onset of ovulation. The lipoidal and aqueous extracts appear to have antagonistic effects on the follicular growth and atresia. Chicks injected with lipid extract show increased ovarian weight, enhanced follicular growth and egg laying started at 22nd week which is earlier to 25th week in control birds. The onset of egg laying was delayed in chicks injected with aqueous extract of largest follicle wall by 4 weeks as compared to control birds. Their ovaries showed decreased rate of follicular growth and increased follicular atresia as a result of which abundant amount of lipid-rich interstitial gland tissue of thecal origin accumulates in them.

    • Histoenzymological differences in the envelope of white and stages of rapidly growing yellow follicles in the ovary of crow (Corvus splendens)

      R K Parshad S S Guraya

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      Histoenzymological differences in the localization and intensities of succinate and lactate dehydrogenases, tetrazolium reductases and steroid dehydrogenases have been studied in the follicular envelope of white and stages of yellow follicles of the crow ovary. The activities of these enzymes in the thecal gland cells show a progressive increase during follicular growth. The granulosa layer of white follicle is devoid of Δ5-3β-hydroxysteroid dehydrogenase which appear and show a gradual increase in the rapidly growing yellow follicles along with other enzymes.


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