Posed on May 9, 2020, edited by Jason, category Veterinary
Human pregnancy test and Pig prenancy test use different detection principles, so pigs should not be allowed to use Human pregnancy test kit to avoid erroneous results.
Human pregnancy test
Principles of Human pregnancy test
Detecting the concentration of HCG in the urine to determine whether a woman is pregnant is a reliable indicator to assist clinical judgment of pregnancy. HCG, or Human Chorionic Gonadotropin, is a glycoprotein produced by the placenta of pregnant women during pregnancy and can be excreted from the urine through the glomeruli.
Causes of human pregnancy test misdetection
The detection time. HCG usually appears in the urine a few days after the fertilized egg is implanted, and it must be detected in a certain amount. Therefore, for women with normal menstruation, HCG may be detected in the urine after menstruation is delayed. And women with long menstrual cycles or abnormal ovulation can only be detected after menopause for 40-44 days.
Urine dilution. If you drink too much water and dilute your urine, you may cause false negative results.
Experiments in the morning and evening may have a certain effect on the results. The urine in the morning usually has the highest HCG value, so many instructions recommend testing in the morning, but this is not absolute.
Pay attention to the length of urine immersion test paper during the test. Sometimes the length of the urine immersion test strip is too long, which may make the test result difficult to judge.
Don't judge whether you are pregnant based on the test results in the case of recent pregnancy. HCG can continue to be positive for a long period of time after termination of pregnancy (after childbirth, spontaneous abortion and artificial abortion).
Some diseases and drugs may cause false positive results. Some tumor cells, such as hydatidiform mole, choriocarcinoma, bronchial carcinoma, and kidney cancer, can also secrete HCG.
Do not use expired test paper. Because the chemical reagent will lose its effectiveness after a long time, so pay attention to the date of production when buying.
Do not use test strips that have been damp.
Pig pregnancy test
Principles of Pig pregnancy test
Take Pig Pregnancy Rapid Test as an example, the body's endocrine changes after pregnancy, of which progesterone (P4) is the most obvious change. Progesterone is a steroid hormone secreted by the corpus luteum and placenta. The performance of a sexual cycle rises daily from low to peak at 15 days After the decline, it fell to the lowest level of 0 ng / ml in about 19 days, maintained for about 1 day, and then gradually increased. Progesterone continues to maintain a high level after the pig is conceived. The urine progesterone reaches 0.05 μg / ml in 26 to 30 days. This product uses progesterone as the detection target and judges whether it is pregnant by the dose of progesterone.
Pig pregnancy test usage
Take the urine from the container, take the straw from the aluminum foil bag.
Suck the urine with the straw, and drop 3 to 4 drops in the circular sample hole (S) of the test board.
At this time, the urine is applied to the test paper under the capillary action The other end of the bar moves slowly, and one or two red lines are seen in the window.
5 minutes to judge the result from the window.
Pig pregnancy test result judgment
Positive: A color band appears in the detection area (T) and the control area (C), indicating that the tested pig is pregnant and should be managed during pregnancy.
Negative: Only one color band appears in the control area (C), indicating that the tested pig is not yet pregnant and can be re-matched.
Invalid: No ribbon appears in the control area (C), indicating that the test failed or the test board is invalid, please take another test board and re-test. Follow the instructions in the manual.
Something about pig pregnancy
How long is pig pregnancy?
The pig pregnancy period: 110 days-120 days, average 114 days "Three systems" means three months, three weeks plus three days, another method is to add 4 to the month, minus 6 to the date;
Pig pregnancy signs
Observe. Observe the changes in the appearance of the pig, such as shiny hair, bright eyes, shiny, joint crack under the vulva shrinks upward to form a line, which indicates conception.
3-4 days after mating, gently pinch the second pair of nipples at the end of the pig, and find that there is a hard milk tube, indicating that you are pregnant.
18-24 days after mating, pigs no longer estrus, appetite increased sharply, no material left in the trough, and the abdomen gradually increased, indicating that they were pregnant.
The accuracy of measuring pigs 25-30 days after breeding with a pig pregnancy tester is as high as 98% -100%.
30 days after mating, the pig hair is black, and the nipple is black and purple halo, indicating that she is pregnant.
When observing the arrangement state of the pig's nipples from the rear side, the nipples are open to the outside, and the mammary glands are raised, which can be used as an auxiliary identification for pregnancy.
Late diagnosis: Fetal movement can be touched after 70 days of gestation, and after 80 days, the movement of the pig's abdominal wall can be seen when the pig is lying on her side.
Pig pregnancy care
The purpose of pig production is to produce piglets with large numbers, large individuals and good health. Under the condition of a certain number of pigs, the quality of pig feeding and management, especially the management of pregnant pigs, directly affects the production quantity and quality of piglets.
Good body condition is an important guarantee for the pig to maintain a high level of fertility.
Early diagnosis of pig pregnancy.
Measures for pigs to protect the fetus.
Increasing the number of litters should effectively strengthen the feeding management of pregnant pigs.
Pigs should be controlled as far as possible during the day. Pigs should be controlled as far as possible during the day.