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Instructions

1

To determine the pregnancy is necessaryUse the method of outdoor research, which will be true only at the end of the pig's pregnancy. For research, carefully and without using force (scratching your sides and stomach), put the pig on your side. Then gently probing the anterior abdominal wall. This must be done at the level of the last two nipples, just above the breast. In doing so, you will be able to feel the fruits.

2

On the third or fifth day after the pig's mating,to determine the presence of pregnancy for curdled discharge from the vagina. The sow lays more, the appetite appears, becomes rather lazy. If more pigs do not go to the mating and do not "walk" for eighteen or twenty days, you can almost with absolute certainty say that she is pregnant. In the last month of pregnancy (the pigs carry their offspring on average 115 days) there is active erythema of the udder and an increase in the colostrum.

3

Often to determine the pregnancy in a piguse the rectal method. Thanks to this method, you can determine the pregnancy in three weeks, in six weeks with greater accuracy. After clearing the gut from the excrement, put on rubber gloves and go to the palpation during the relaxation of the intestine. The external artery has a iliac diameter and gradually thickens during the swine's pregnancy. By the end of the first month of wearing, one can feel the vibration of the middle uterine artery, a weak pulsation is felt in the urogenital artery.

4

In laboratory and clinical conditionsThe most promising method is used, which determines the pig's pregnancy with one hundred percent accuracy. To do this, use ultrasound to determine the pulsation of the fetus in the uterus of the pig. Also in practice, the method of vaginal biopsy is used to establish pregnancy. A small piece of tissue is taken from the anterior wall of the vagina and examined under a microscope. This method is absolutely safe for the pig and fetus, does not require special training.

Tip 2: How to determine the magnification of a microscope

A microscope is an instrument designed forenlarge images, as well as to measure objects or details that are poorly visible or completely invisible to the naked eye. To do this correctly, you need to know the extent of the increase microscope.

Instructions

1

The microscope consists of the main elements: eyepiece and lens. They are fixed in a movable tube, which is attached to a metal base. On the same basis, there is a stage. Also in modern microscopex most often there is a lighting system that allows you to better examine the subject.

2

A lens is an optical device that projects an image onto a plane. He is responsible for the useful enlargement object. Most often the lens consists of several lenses. The increase in the objective is approximately equal to the ratio of the optical length microscope to the main focal length f about. lens. The magnification is always indicated on the lens by numbers. The most commonly used lenses for mastering the school program are x8 and x40.

3

The eyepiece is part of microscope, which is facing the eye. It is designed to be viewed with some enlargementm image, which gives the lens. The eyepiece can consist of two or three lenses. Eyepieces do not help to reveal new details of the structure of the investigated object, and in this respect their enlargement useless. The eyepiece magnification can be found in the same way as enlargement any magnifier. It equals the ratio of the best view (that is 25 centimeters) to the main focal length of the eyepiece (f approx.). Most often used eyepieces with enlargementm 7, 10, 15. It is indicated by numbers on the eyepiece itself.

4

To find the optical magnification, you will also need the value of σ. This is the optical length microscope, which is equal to the length between the inner foci of the lens and the eyepiece.

5

Based on the structure microscope, it becomes clear that the object under study is behind a double focal length on the other side of the lens. Thus, the enlargement microscope you can, knowing enlargement lens and eyepiece. It will be equal to their product (N = σ * 25 / f об. * F ok).

Tip 3: How to determine the pregnancy in the first week

For someone, pregnancy becomes desirable,long-awaited, someone is afraid of this condition, and someone frankly pushes this moment out of his life until he completely abandons the possible conception and birth of a child. It will be right for a woman to know about the signs of a possible pregnancy in the first week of such a natural female condition.

Instructions

1

If you measure basal temperature regularlyand you do it the right way, in the first week of conception it will increase and will be a larger indicator than 37oC. Increased fatigue, mood swings, irritability, drowsiness, frequent migraines suggest possible conception.

2

Buy a test for pregnancy. The test should have a high sensitivity for such a short conception period. Do your own research with the test in the amount of two times, even if the first result was positive to be completely sure of his testimony.

3

Changes in the hormonal background in the first weeks of pregnancy lead to symptoms such as excessive sweating, throwing in fever. Appetite, taste preferences can change.

4

Of the unpleasant sensations in the first week of conception, there is a drawing pain in the lower abdomen, his swelling, flatulence, nausea (especially in the morning), painful swelling of the mammary glands, pain in the lower back.

5

Peculiar signs of pregnancy, but not sucheven rare, it is: sneezing, nasal congestion, increase and designation of the thoracic veins, a strange taste in the mouth (for example, metallic), increased salivation even at night, leg cramps, abruptly appeared exfoliation of the nails and their breaking, darkening of the nipples on the chest, the appearance of a dark stripes along the abdomen.