In general, estrus is estrus in February and March. Due to the difference in latitude in different regions, the time to start estrus was slightly advanced and delayed. Heilongjiang had estrus in late January, Jilin and Liaoning began estrus in early February, and the peak period of estrus breeding was in late February (more than 80%).
Mother estrus
Storks only have estrus once a year, and very few individuals have two estruss. The estrus period is from early February to early April and lasts for 2 months. Mother lice are estrus when vulva and pubic hair are separated. From the vulva revealing to the mother lice can receive mating, generally takes 7-1 2 days, the shortest 4 days, up to 25 days. Changes in the female genitals during estrus can be divided into three stages:
Pre-estrus: The genital area is obviously exposed. The vulva is slightly reddish, round, slightly swollen and elastic.
Estrus period: The genital area is highly swollen and eversion, showing a round or oval shape. The skin on both sides of the vulva has a small amount of wrinkles. The vulva mucosa is dark red or purple, and the secretions are milky or milky yellow, usually lasting 2-4 days. At the time of love, the mother-in-law actively approached the public squatting. When the male cubs climbed, they did not move, and the mother's cricket curled to one side and accepted the mate.
Late estrus: The vulva gradually shrinks, the pubic hair closes, the mucous membranes dry, and the secretions are small and thick yellow, and the libido declines rapidly. Some female puffer genital changes are not very obvious, mostly for the initial situation of seedlings retained in the year, by judging whether the estrus. If a male person with a strong sexual desire is used as a public prostitute, if his mother is away from public funds or is holding her tail back and biting public money, it means that the mother’s estrus is not good, and the trial may be repeated every other day or every 3-4 days. Some mother-and-mother couples are very selective. Although the changes in the genitals are obvious, they can not be matched after they are released.
Method of breeding
Natural mating is generally taken in time for breeding. After the public has reached the deal, the mother-in-law flips her body and opposes the belly of the male and sends out a squeak. Mating time 6-12 minutes, up to 25 minutes. The duration of mating is usually 1-4 days, during which 2-3 days can be compounded to increase the fertility rate of the mother.
Precautions
Observe carefully, do not interrupt: estrus is the basis of mating, the keeper must do at least two times a day early and late to observe the 貉 情 情 情 情 situation , å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 å‘现 。 。 。 。 。 。 。 。 。. Do not check the "love" occasionally. If you miss the best time, you can't mate. The year's breeding will be abandoned. Because the scorpion's estrus is only once a year. To make it estrus again, only wait until next year.
Moderate breeding, do not be too frequent: For species that have reached the mating standard, under the premise of ensuring the success of the mating, let them interact with the public for three times, that is, the morning of the first day, the morning and evening of the second day. Once, under normal circumstances, three matings will be fully pregnant. At the same time, pay attention to try to allow two kinds of male cubs to alternately complete the mating of a female species, so that the fertility rate and the farrowing rate can be increased. Do not think that uncontrolled multiple matings will result in high probability of conception. Frequent mating is not only a waste of public money resources, but also may cause damage to reproductive systems of species, breed various inflammatory diseases, and affect litter size. Some even cause "dethrone".
Natural mating, don't be artificial: If for some reason, the storks fail to reach estrus in time or have no estrus at the end, they must not artificially promote estrus or take measures to force them to mate with the public. A large number of facts have proven that some culturists, after feeding estrus drugs for estrus species that are not estrus, have estrus status and can't get pregnant after mating. They can't even give birth; some use force-bearing pods to force crickets to ride. The result is also futile. Of course, it is possible to scientifically add some auxiliaries in the feed (such as vitamin E, green onions, etc.), which can stimulate and promote estrus.
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