After the egg is laid, the hen starts all over again about 30 minutes later. The egg start with the process of an ovulation from ovary and goes toward the other parts of reproductive tracts where different secretion occurs and finally the formation of an egg occurs. The hen’s reproductive system consists of the ovary, the organ where the yolk develops, and the oviduct where the egg is completed. In humans, these laterally paired organs lie within the peritoneal cavity. Egg Formation Ovary = yolk formation Oviduct = Albumin, shellmembrane and shell • Mature henhave 3600-4200 ova • Egg formation requires 23-26 hours Muhammad Arslan Musa 4. After insemination, one of the ova at the periphery of the ovary began to expand, taking up yolk. A hen requires about 24 to 26 hours to produce an egg. The process of egg formation in the body cavity of a phytoseiid mite, Phytoseiulus persimilis, was observed to examine fertilization of male eggs. Genes such as WNT-4 and DAX-1 necessary for initiation of female pathway ovary development, female gonad is not considered a default process.. Egg formation in the ovary: Eggs are formed in the reproduction tracts of the mature female bird. • Yolk matured in 10 day • Ovulation take place 15-75 minutes after oviposition • The earlobe color of hen canbe an indicationof eggshell color with some exceptions Muhammad Arslan Musa In this article, I will explain what an egg is and how formation of an egg takes place in the poultry. Many organs and systems help to convert raw materials from the food eaten by the hen into the various substances that become part of the egg. Here I will briefly describe the stepwise development of the main structures of the chicken egg in the ovary and during its passage through the reproductive tract. The egg is formed gradually over a period of about 25 hours. The female gonad is the ovary and is closely associated with female internal genital (reproductive) tract development. The tract consist of the ovary and oviduct. Egg Anatomy Fertile (hatching eggs) and infertile eggs have many of the same structures These structures can be classified: •Nutritional •Protective (biological and physical) •Facilitative . Formation. The yolk is formed in the ovary, while the albumen, shell membranes and shell are formed in the oviduct. The ovary is … Reproductive Anatomy and Egg Formation AgScience Poultry Science Curriculum Section 3. Of these, only a small proportion (250-500) will later acquire yolk and develop into mature ovulatory follicles to give rise to egg formation (2).