Advice 1: How does a fertilized egg a chicken

In order to confidently determine whether a fertilized chicken egg, you need to know the characteristics of the formation and activity of the embryo. Tips fanciers will tell you how to distinguish the living from the dead embryo.
For proper breeding chickens need to be able to distinguish the fertilized eggs from the unfertilized
Instruction
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Chicken is the most popular bird in peasant farms and farms. The breeding of this bird allows to solve two problems at once: the provision of meat and eggs. So for the owner it is important to know how to distinguish the fertilized eggs from unfertilized.
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And devices that can help in the checking of eggs.

For this purpose there is a special machine produced by the domestic industry – candling. It is a small container with grooves for laying eggs and illumination located on the bottom. If such a device is not in the household, you can substitute homemade or use a regular piece of thin cardboard rolled into a tube with a thickness of 2-3 cm One end of it to attach to the egg, podnebennoy the light source and from the second to examine its contents.
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How to know whether a fertilized egg?

If the egg embryo, it's possible to determine no earlier than 6 days after the start of incubation. When scanning in the early period (4-5 days) may be visible shaded area without clear boundaries the size of a match head, which, when turning the eggs horizontally moves after yolk, a little behind him by the speed of rotation. Poultry farmers claim that if this area looks like the letter "O", that is, the more pronounced the contour of the spot, then the egg is fertilized. If the stain darkened completely, no.
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On the 6-7 day in the thinner end of the egg becomes clearly noticeable by a network of delicate blood vessels located near the yolk clearly visible air chamber. Germinal disk (blastoderm) reaches a size of 5-8 mm, it becomes more clear shape and still looks like a pretty dark spot. If blood blotches scattered in the content, it is a sign that the embryo is not there, or he died. Consider eggs pointy end down, slowly turning them clockwise.
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In 7-10 days it is possible to determine reliably whether the chick is alive. If he properly develops, the yolk becomes more pale. In the result of embryonic activity is the exchange and around the embryo is formed a light yellow ring. He looks like a dark spot of irregular shape with distinct boundaries. On day 18 using the medical stethoscope to hear the fetal heartbeat.

Advice 2: How to determine the fetal heart rate

For every future mother is very important to hear the beating of her heart unborn crumbs. To determine the fetal heart rate was possible due to several methods, for example by means of conventional obstetric stethoscope, ultrasound machine, and for performing echocardiography of the fetus.
How to determine the fetal heart rate
Instruction
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The easiest way to hear a fetal heartbeat with the help of medical stethoscope. Attach the diaphragm of the stethoscope to the abdomen, a flexible tube insert in the ears. With this device you can hear other sounds of the female body. However, to distinguish the baby's heartbeat in the womb, according to his rhythm – he's about two times faster than women. To hear using stethoscope heart rate is possible only to the 16 – 17th week of pregnancy. You can distinguish the sounds of the beating of a heart, applying his ear to the woman's stomach, but it depends on the position of the fetus against the uterine wall.
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Listen to the baby's heartbeat by ultrasound, which can distinguish the pulsation of the cardiac muscle of a fetus for 3 or 4 weeks pregnant. With the help of ultrasound machine can also monitor the correct development of the heart and blood vessels of the fetus. This method allows to identify possible deviations and provide timely medical assistance.
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A fetal heartbeat can be heard on echocardiography. This method is an ultrasound examination of the fetus, a bit different from the usual that all the attention is paid exclusively to the heart. Echocardiography allows to investigate the function of the fetal heart in two modes. A one-dimensional mode is applied to study only the cardiovascular system, and Doppler is intended for research and analysis of blood flow in different cardiac departments. Echocardiography helps the specialist in the study of the structure and function of the heart and adjacent large blood vessels and can be performed solely on the testimony of doctors – cardiologists.
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One of the most effective methods for listening to the heartbeat of the fetus is cardiotocography. It is a simultaneous registration of fetal heart rate and uterine contractions in childbirth. Cardiotocography has been widely used in the late last century and has provided physicians with the possibility of more careful monitoring in the delivery period for the fetus. In the period of fights the cuts affected not only the uterus, but the whole abdominal cavity. This affects primarily on the supply of oxygen to the baby. CTG also gives the opportunity to determine the motor activity of the fetus.
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