Ovarian follicular dynamics in peripubertal Malabari goats
The aim of this study was to characterise the follicular dynamics in first two oestrous cycles of peripubertal Malabari goats. Transrectal ultrasonography was carried out on alternate days of oestrous cycles after first observed oestrus. Follicular studies revealed presence of two to five wave cy...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Director of Academics and Research, Kerala Veterinary and Animal Sciences University
2022-12-01
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| Series: | Journal of Veterinary and Animal Sciences |
| Subjects: | |
| Online Access: | https://jvas.in/public_html/upload/article_file/article_file_ropzr7.pdf?t=ropzr7 |
| Summary: | The aim of this study was to characterise the follicular dynamics in first two oestrous cycles
of peripubertal Malabari goats. Transrectal ultrasonography was carried out on alternate days of
oestrous cycles after first observed oestrus. Follicular studies revealed presence of two to five wave
cycles with predominant three and four wave patterns. The interwave interval for ovulatory wave
was longer than preceding waves in three and five wave cycles. The diameter of largest follicles
in wave 1 was larger than follicles of subsequent waves of three, four and five wave cycles. The
largest follicles in each wave could be observed from day 3 to day 13 of oestrous cycle. Majority of
ovulations occurred on day 20 of oestrous cycles and short cycles were more in first oestrous cycle.
The overall mean per cent of single and double ovulations were 56.3 and 43.8 and mean ovulatory
follicle size was 6.59 ± 0.11 mm in peripubertal goats. The mean length of first and second oestrous
cycle was observed as 17.72± 0.79 and 20.19± 0.43 days, respectively and mean duration of
first and second oestrus was 36.88 ± 2.44 and 40.13 ± 1.84 h, respectively. The study revealed
that predominant wave pattern was three and four waves in peripubertal Malabari breeds. The first
oestrous cycle length was shorter and characterised by higher percentage of single ovulations with
smaller periovulatory follicle size. Larger ovulatory follicles and double ovulations were observed in
second oestrous cycle. |
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| ISSN: | 0971-0701 2582-0605 |