Serum Endocrine Profile in Relation to Estrus Synchronization in Surti Does

M. M. Chaudhary, C. T. Khasatiya, S. B. Patel, S. S. Chaudhary, V. B. Atara, D. K. Patel

Abstract


The serum progesterone and estradiol profiles during synchronization of estrus by buck effect and
PGF2α treatments were monitored in Surti does. Total eighteen non-pregnant does selected were
evenly divided into 3 groups, 6 does in each group. The does of Group I were teased with a sexuallyactive-
apronized buck; and those of Group II were treated with PGF2α, i.e., Inj. Lutalyse® @ 7.5
mg/doe IM twice 11 days apart, while the Group III served as untreated control. Blood samples
were collected from all the animals on day 0 (before 1st PGF2α injection), 3rd day (during treatment),
11th day (before 2nd PGF2α injection), 14th day (after treatment) and 40th day (post-service) by jugular
vein puncture. The serum separated was stored at -20°C till further analysis. In all the three groups,
83.33% does, conceived at first service in the sampling cycle. The overall mean serum progesterone
concentration of Group I does (5.82±0.72 ng/ml) was significantly higher (p less than 0.01) as compared
to Group II (2.93±0.38 ng/ml) and III (2.88±0.30 ng/ml). Similarly, the overall mean serum
progesterone concentration of Surti does on day 0 (2.65±0.46 ng/ml), 3rd (2.56±0.80 ng/ml), 11th
(4.45±0.84 ng/ml) and 14th (3.40±0.63 ng/ml) did not differ significantly, but the overall mean level
at day 40 (6.31±0.45 ng/ml) was significantly (p less than 0.01) higher, because most of animals became
pregnant at that time. The overall mean serum oestradiol-17β levels of Group I (24.40±2.98 pg/
ml) was significantly higher (p less than 0.01) than in Group II (15.77±1.77 pg/ml) and III (12.21±1.45 pg/
ml). On the other hand, the overall mean serum oestradiol-17β levels of Surti does on day 0
(12.89±1.21 pg/ml), 3rd (15.84±1.74 pg/ml), 11th (14.81±1.96 pg/ml), 14th (22.15±2.97 pg/ml) and
40th (21.64±5.16 pg/ml) did not differ significantly (p>0.05) and the slightly higher overall mean level
found at 40th day might be the influence of the non-pregnant does at first service in the cumulative
animals. The hormonal profile reflected the initiation of cyclicity and establishment of pregnancy
in treated and control animals.

Keywords


Estrus synchronization, Oestradiol-17β, Progesterone, Conception, Goat.

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DOI: http://dx.doi.org/10.21887/ijvsbt.v13i03.10609

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