The normal incubation period of royal chicken is 21 days (the calculation of chicken embryo age should be started when the eggs reach the normal incubation temperature). During the entire incubation period, appropriate incubation conditions such as temperature, humidity, ventilation and turning eggs should be given. The chicks should be Within 20 to 21 days, shells were hatched. During this time, chicks hatched had a high rate of hatching, a high survival rate during the brooding period, and an extended or shortened incubation period had adverse effects on hatching rate and chicks. High incubation temperature and rapid embryo development lead to shortened incubation period, hatched chicks are dehydrated, and the mortality rate is very high within one week of age. When the incubation temperature is low, the incubation period is prolonged, the yolk of the chick is poorly absorbed, and the proportion of the "bellied navel" chicks is high, which is also unfavorable to the robustness of the chicks. Therefore, it is necessary to understand the main characteristics of different stages of the embryonic development of the pheasant and to give corresponding hatching conditions according to the embryonic development so that the incubation period of the embryo is between 20.5 and 21 days. The main features of chicken embryo development are as follows: Day 1: Fertilized egg cells, in the production process string, stay in the fallopian tube for approximately 24 hours, the embryo has begun to develop, and the egg cells have undergone multiple divisions. When the egg is produced in vitro, the chicken embryo has developed into the gastro-intestinal phase of the endoderm and ectoderm. The fertilized egg is dissected and the disk-shaped blastoderm is visible to the naked eye. After hatching on the first day, the diameter of the blastoderm was about 0.7 cm. There were many red spots on the edge of the blastoderm and they were called "blood islands". Day 2: The blastoderm was 1.0 cm in diameter. The yolk sac, amniotic membrane, and chorion began to form. The embryo's head was separated from the blastoderm and blood islands were combined to form blood vessels. After 25 hours of incubation, the heart begins to form, 30 to 42 hours, the heart has been beating, visible yolk sac blood vessels, the shape of cherries, commonly known as "cherry beads." Day 3: The embryo length is 0.55 cm. The allantoic capsule grows. The position of the embryo is perpendicular to the long axis of the egg. The buds of the limbs begin to form. The pigmentation of the eye begins to calm, and the embryo and the stretched yolk sac vessels can be seen. The shape of a mosquito, commonly known as "mosquito beads." Day 4: Rapid development of embryos and blood vessels, surrounded by 1/3 of the yolk sac vessels, enlarged heads of the embryos, visible formation of allantoic sac and amniotic cavity with the naked eye, yolk not easily turning when the eggs are laid, embryos and yolk sac vessels It resembles a spider, commonly known as "spider." Day 5: The embryos are further enlarged. The embryos are about 1.0 cm long. There is a lot of pigmentation in the eyes, and there are obvious black spots in the eyes, commonly known as "single beads" or "black eyes." Day 6: It can be seen that the embryos move regularly and the yolk increases. The yolk sac is distributed over 1/2 of the surface of the yolk. Because the trunk is enlarged and the head is shaped like two beads, it is commonly called “double beadâ€. Day 7: Embryos have formed the characteristics of chickens, allantoic fluids have increased significantly, and the embryos themselves have had body temperature. When embryos are in the amniotic fluid, it is not easy to see the blood vessels, and blood vessels cover half of the egg surface. Day 8: The embryo length has reached 1.5 cm. Feather nipples appear on the neck, back, and limbs. When the eggs are laid, the embryos float in the amniotic fluid. The eggs on both sides of the back of the egg are not easy to shake, commonly known as “hard edgesâ€. . Day 9: The necropsy shows that the heart, liver, stomach, kidney, and intestines are well-developed. The allantoic sac surrounds the entire embryo. When the egg is laid, it is easy to see the yolk on both sides. The allantoic blood vessels stretch over the yolk sac. ". Day 10: The embryo has been as long as 2.1 cm. The allantoic blood vessels have been stretched to the small end of the egg and they are closed. The entire egg is covered with blood vessels and is called "closed." On the eleventh day: The embryos were further enlarged, the allantoic fluid reached the maximum amount, and the back appeared villi and blood vessels thickened. Day 12: The embryo has reached 3.5 cm in length, and the body has grown to fluff. The stomach, intestines, and kidneys have already functioned, and they begin to lick the protein with their mouths. On the 13th day, the development of the skin system such as villus and keratoderma of the chick embryo was further improved, and the small part of the hair of the egg was gradually reduced when the egg was laid. Day 14: The embryos were covered with villi and head-to-air chambers. The position of embryos perpendicular to the long axis of the eggs was replaced with the long axis of the eggs. Day 15: The embryo has developed the internal and external organs of the chicken. Day 16: The length of the embryo is about 6 cm. The crown and flesh can be clearly seen. Most of the protein enters the amniotic cavity. Day 17: The amniotic fluid and allantoic fluid began to decrease. The trunk was enlarged, and the feet, wings, and neck became longer. The eyes and head were correspondingly smaller. The legs held their heads tightly to the air chamber, and the proteins all entered the amniotic cavity. According to the part of the egg that cannot be seen in the small head, it is commonly called "closing the door." Day 18: The amniotic fluid and allantoic fluid were further reduced. The head was bent under the right wing. The eye began to open and the blood vessels of the lungs were almost formed. However, lung breathing was not yet carried out. The embryos turned around, and the air was stricken by the Qi and Yang dynasties. "Bevel". Day 19: Yolk sac constriction Inhale most of the egg yolks into the abdominal cavity. Inhale into the popular room to begin lung respiration. In the warm room of the neck and wings, head is buried under the right wing. Legs are bent toward the head, and the arms are held in a posture to facilitate shelling. When it is stretched, the earlier developed chick embryos are broken first and can be heard by chicks. After 19 days and 18 hours, a large number of chicks have been shelled. 20th to 21st days: The allantoic cells are completely withered, and the entire egg yolk is sucked into the abdominal cavity. After the chicks are husked, the shell is broken along the transverse diameter of the egg in a counterclockwise direction until the crack is 2/3 of a week in diameter. Feet hard earned, broken shells out. Dongying Hong Xing Labor Protection Products Co.,Ltd. , https://www.hongxinglabor.com