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Development and Function of the Ovary and the Uterus in Goats
In Alpine-Malabari cross-bred female kids., the birth weight was found to be 1.88-+0.048 kg. The gain in weight was maximum (15.36%)during the first 30 days but was only marginal after 210 days. Linear measurements of teat also showed changes parallel to the body weight. From 30th day onwards, many...
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| Outros Autores: | |
| Formato: | Ph.D Thesis |
| Idioma: | Undetermined |
| Publicado em: |
Mannuthy
Department of Physiology, College of Veterinary and Animal Sciences
1984
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| Resumo: | In Alpine-Malabari cross-bred female kids., the birth weight was
found to be 1.88-+0.048 kg.
The gain in weight was maximum
(15.36%)during the first 30 days but was only marginal after 210 days.
Linear measurements of teat also showed changes parallel to the body
weight.
From 30th day onwards, many small follicies were seen projecting
from the ovarian surface. Appearance of large follicles on 150th day
indicated the attainment of full functional activity of the ovary by that
time.
The right ovary weighed significantly more than that of the left.
The weights of thyroid, adrenals and pituitary, as percentage to
weight at slaughter, showed a linear reduction as the age advanced.
Onset of puberty was observed to occur at 231.40_+6.271 days in
Alpine-Malabari goats. The weight at puberty was 13.19_+0.35 kg. The
length of oestrous cycle was 508.17_+ 66.55 hours (12.17 days). The
occurence of short (5-15 days), medium (16.24 days) and long (25 days
and above) oestrous cycles were recorded as 6.32 per cent, 84.09 per
cent and 9.09 per cent respectively. The average duration of oestrum
was 49.43 _+ 6.18 hours.
The weight of ovary was maximum on the 18th day of oestrum
cycle in adult Alpine-Malabari cross-bred goats.
The weight of
fallopian tube was highest on the day of oestrum. Packed cell volume
and total leukocyte count were significantly more on the day of
oestrum. In the differential distribution of leuckocyts, Iymphocytes
registered a low count while the number of neutrophils and eosinophils
recorded a rise on the day of estrum suggestive of a stress-like state.
At brith, the ovary showed a single layer of cuboidal cells in the
germinal epithelium. Primary, secondary and degenerating follicles
were seen.
On 30th day, tertiary follicles also were noted.
Large
ovulatory follicles were seen on the 120th day in histological studies.
Uterine mucosa
colummar
epithelium.
at brith was lined by tall pseudostratified
Uterine lumen was almost obiterated by
endometrial folds. Five different layers viz. epithellal lining, vascular
layer, stratum compactum, stratum spongiosum and stratum basale
could be distinguished from 30th day. Active secretion of endometrial
glands was noted by 150 days.
Intense alkaline phosphate (ALP) activity was noted in theca cells
of follicles and in luteal cells. Acid cells of endometrium and glands
showed high activities of alkaline and acid phosphatases.
During luteal phase of oestrous cycle both ACP and ALP
activities were more than those in follicular phase.
The serum glutamate oraloacetate transaminase (GOT) and
glutamate
pyruvate
transaminase
(GPT)
levels
were
more
corresponding to the period of higher growth rate. On the day of
oestrum GOT values in serum, ovarian and uterine tissue were
significantly more. However, GPT, ALP and ACP activities did not
reveal any significant difference during the four phases of oestrous
cycle.
Administration of gonadotropin relasing hormone (GnRH)
resulted in an increase in weight gain of kids. In the treated kids early
onset of puberty and a higher number of ovarian follicles were
observed. Growth of ovarian tissue and tubular genitalia- especially
the uterus- were more in treated kids.
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