SU895380A1 - Method of stimulating mink uterus secretion - Google Patents

Description

(54) METHOD OF STIMULATION OF Uterine Secretion of Minors

I

FIELD OF THE INVENTION The invention relates to the field of rural and pesnoy household, namely to animal husbandry.

There is a method of stimulating uterine secretion of farm animals, which includes administering hormone preparation, megestrol G1 acetate, to hormones in feed.

There is a method for stimulating uterine secretion of minks, which includes the introduction of megestrol acetate and double coating f2. According to this method, megestrol acetate is introduced into the feed by females during the breeding season (extrusion) and the animals are mated in two hunting periods.

A disadvantage of the known methods is high embryonic and postembryonic CMepiTJOCTb,

The purpose of the invention is to reduce embryonic and postembryonic mortality. ; The goal is achieved by the fact that in the proposed method of stimulation of uterine secretion of mink, including the introduction of

Megestrol acetate feed and double suppression, megestrol acetate is added during the rut period, the first coating is produced not earlier than 4 days after stopping the introduction of megestrol acetate, and maintains the interval between two coatings 7-10 days.

The mink is a seasonally polyestric animal with ovulation provoked. In a relatively short period of pairing (February-March) at the burrows. With several follicle maturation cycles. fishing for ovary and readiness to mate, regardless of whether it was fertilized in the previous cycle or not. Due to the presence of embryonic diapause, fertilized eggs do not implant before the beginning of April, the yellow bodies are not active during this period. As in experiments, when fertilized females overlap with an interval of seven days or more, the fertilized eggs die.

Example. Acetate, megestropa is preliminarily dissolved in ben-i-benzoate (5 mg of the drug and 1 ml of benip-benzoate), and then in sunflower oil so that 200 ml of the drug is contained in 1 ml of the oil. Sunflower oil with megestrol acetate was thoroughly mixed with the morning food (ground meat) and fed to the females. As experiments have shown, the drug is inhibited by follicle growth and the manifestation of hunting. Mass pairings begin on the fourth day after discontinuation of the drug. After the first mating in experimental animals, an average of two oocytes was ovupirovano less than the control females.

In the second cycle of mating, through this and more days, the number of ovulated eggs in the experimental and control animals was the same. Therefore, covering the females during the second hunting period is a prerequisite for maintaining the level of normal fertility. Pearl mink from 18 to 24 February was given with a morning dacha feed of 200 μg of megestrop acetate acetate, dissolved in sunflower oil, per head for 7 days. In order to completely eat the drug, the portion of feed was reduced by 25% (the evening one was increased accordingly). Control analogous females were received in the morning with 1 ml of pure sunflower oil. Experienced and control animals were housed in the same order and served by one worker. Gon experienced and control animals began on March 1. Mating was carried out in, two periods of hunting. The results of whelping experimental and control minks are given in the table.

209 8.60% 6.32tO, 14 5, 83 ± 0.15

5.76tO, 14

0.07

As can be seen from the above data, the fecundity of the experimental and control females was the same. The increase in the yield of the young in the experimental group occurred in 1973 due to better fertility and a decrease in embryonic mortality, and in 1974 and due to a reduction in puppies' waste in the first days after birth, that. can explain

246

255

16.70

22.0

6.1510.12

6.1110.12

5.4110.15

5,14tO, 14

5.26t 0.175, Oil 0.17

4.42 ± 0.17

0.12

0,4O

0.72

the action of megestrol acetate on the preparation of the uterus for implantation, the best nutrition of zygotes and implanted embryos during pregnancy.

In microscopic examination of histographic devices of the follicular apparatus of the ovaries in minks, stimulation of the uterine secretion of which was carried out according to the prototype method, a high embryonic 8 - bp -> -, - tgg- was established. Fo rum y pa inventions i and 0.0006, „„. „„ „,, M: .g; 1tg;. ™ cG coating, I distinguish what, about the purpose of ck ,.„ ,. jp: j;,:. Lr: 538O4. OS ™ m6r „a„ „„ „, death„ „e ™,,„ „in ™ g megesgrol is introduced during the rut period, lane, Er --- g-source of information, IU Tv1 ° cG examination 1. ABTOfrcKoe certificate of the USSR f, 1, ° -Sv- P «« ta: g

Claims (1)

Claim A method of stimulating uterine secretion of minks, including the introduction of megestrol acetate with a feed and a two-fold coating, characterized in that, in order to reduce embryonic and megestrol, they are administered during the rut, the first coat is made no earlier than kerez 4 days after the cessation of administration of J megestrol acetate , and maintain the interval between two coatings 7-10 days.