Vaginal examination vaginal mucous membrane color: Cows vaginal mucous membrane changes from pink to pale, dull, dry surfaces after cows are pregnant. Mucus traits: After two months of pregnancy, there is a thick mucus near the cervix. After 3 months of pregnancy, the mucus volume increases and becomes thicker. At the same time, vaginal contractions and insertion of the opener have resistance. This is because the cervix is ​​gloomy. Thick liquid closed. Changes in the cervix: After the cow is pregnant, the cervix is ​​closed and closed by a dark, thick liquid, forming a uterine thrombus. The position of the cervix: With the increase of the number of days of pregnancy, the cervix is ​​displaced from the middle of the vagina to the lower part, sometimes to one side.
Rectal examination is the most accurate and simple method of pregnancy identification commonly used rectal examination, that is, across the rectum wall touching the luteal changes in the ovary and changes in the uterus to determine whether the cow is pregnant. After 20-30 days of mating, a normal corpus luteum was found on one side of the ovary. Without estrus, the cow was preliminarily determined to be pregnant, and the corpus luteum increased. In order to confirm, it can be checked again 40 to 50 days after mating, and combined with changes in the uterine horn to judge. At this time, the uterine horn became short and thick, and the gestational angle was like the tip of the flashlight. No contraction reaction was palpated. If it is soft, such as a water bag, it can be determined as pregnancy. Although the ovary has a corpus luteum, and the cervix is ​​full of hypertrophy, like a sausage, it is not pregnant, but is morbid. The reason is that the corpus luteum in the ovary is a persistent corpus luteum and inhibits follicle development, so it is neither pregnant nor estrus. After a 30-day inspection of the cows for mating, the cows can be found early and they can be supplemented early. If the cow is pregnant, a flat gestational corpus luteum can be found, which is thicker, harder than follicles, and the border between the corpus luteum and the ovary is distinct. The follicular development is not pregnant, and the follicular and ovary boundaries are not obvious. Two months of pregnancy, touching the uterine horn, it is difficult to distinguish between the angle between the two uterine horns. Pregnancy angle is 1 to 2 times larger than empty angle, and the wall of pregnancy angle is thin and soft. The touch is obviously fluctuating. The cervix has been moved to the entrance of the pelvis. After 3 months of pregnancy, the angle between the groove disappeared, the gestational angle was significantly thicker, with a sense of volatility, the cervix has been moved to the front of the pubic bone, then only touch part of the uterus, gestational angle has fallen into the abdominal cavity. After 3 months, the fetus has increased. At 8 months, it can be seen from the appearance of the cow's abdomen to see if it is pregnant. Rectal examination is not necessary.
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