Relationship between the value of the estrous detector measurement result and serum progesterone level in Etawa crossbred goats after estrous synchronization

Abstract

This study was conducted to determine the relationship between the estrous detector's reading value (Draminski®, Dramiński S.A, Poland) and serum progesterone levels on Etawa crossbred does. Eighteen healthynon-prehnant Etawa crossbreds does weighing 20-25 kg, in their first parity were used in this study. The does were divided equally into two groups. In the two groups, the does were synchronized their estrus by means of intramuscular and intravulvar injection of 7.5 mg prostaglandin Fɑ (PGF2ɑ) twice in 11-day intervals. After the second injection, the estrous detector value measurement, visual observation of the estrus sign, and blood sampling were conducted for five days. The blood sample was processed into the serum to examine for progesterone levels by ELISA. The data analysis was using the simple correlation method on SPSS type 23 for windows. The result showed that a positive relationship (p <0.05) with coefficient correlation (r) was 0.609 between the values of the estrous detector measurement with serum progesterone levels. It could be concluded that the estrous detector's low value indicates that the Etawa crossbred was in the estrus phase and followed by the decreasing of progesterone level but not reaching the basal level.

Serum Progesterone profile of pregnant Ettawa crossbred does at day-0, -21, -42, -63 and -84

“…Three days after the second PGF2α injection, does was observed showing signs of estrus such as the redness and swelling around vulva, tail wagging, and mounted the other goats, followed by a thick and clear discharge from the vulva (Triagil et al, 2020). All of the estrus synchronized does were observed for their estrus after twice PGF2α injection.…”

Intracervical Artificial Insemination using Frozen Semen of Boer buck on Pote Does at Different Times of Estrus

“…The onset of estrus (in hours) was determined based on the interval from the last PGF2α injection to the first estrus symptom (restlessness, riding on other goat, and rubbing their bodies against the housing wall). The perfect estrus is marked by a reddish, swollen, warm vulva and discharge of watery mucus from the vagina (Triagil et al, 2020). Data of the onset of estrus were evaluated using independent t-test in Statistical Product and Service Solution (SPSS) version 23 for Windows at 5% level of significance.…”