PSVII-34 - Reproductive qualities of sows using exogenous progesteron

The aim of this study was to research the endocrine status and reproductive quality of sows using a prolonged drug containing 15% progesterone. Endocrine status in sows was examined at 9, 11, 16 and 21 days after insemination. The level of progesterone was determined by enzyme immunoassay. The sows of the experimental group (G1, n = 20) were injected in a dose of 2.0 ml on the 10th day after insemination, the sows of the control group (CG, n = 20) were control. It was found that the level of progesterone in the blood of G1 slightly increases from 9 to 11 days after insemination. In the G1, the steroid concentration increased from 2.28 ± 0.23 to 2.35 ± 0.15 nmmol / L, and in the GC from 2.35 ± 0.07 to 2.58 ± 0.10 nmmol / L. On the 16th day after insemination in G1, the progesterone level  was accompanied by a sharp rise of 2.7 times (P < 0.001) - to 6.44 ± 0.58 nmmol / L, the level of the hormone in the GC did not change. The high level of progesterone in this critical period favorably affects the implantation of the embryos and causes a further normal course of pregnancy. On the 21st day after insemination, the progesterone concentration in both groups decreased. However, the level of this steroid hormone in the group when using this hormonal agent remained 1.95 times higher (P < 0.05) than in the control. Also, in G1 there is an increase in multiple pregnancy by 11.55%, the number of live newborn piglets by 23.36%, a decrease in the number of stillborn piglets by 2.14 times (P < 0.05) and mummified fetuses by 11.11%, compared with similar indicators of the control group.