1. Early hatching (days 1 to 6) can be affected by several factors. Poor nutritional and health conditions in the breeder flock, particularly deficiencies in vitamins A and B, can lead to early embryonic mortality. Long storage times of eggs, especially when temperatures are too high or too low, can also negatively impact development. Over-sterilization during egg fumigation, incorrect pre-incubation temperatures, or severe vibrations during transport may further contribute to early losses. 2. Mid-term death (days 7 to 12) often occurs due to poor breeder nutrition and health, with common deficiencies including vitamin D and B2. Improper preheating before incubation, lack of sterilization or disinfection, and incorrect incubation temperatures can all play a role. Eggs that are not turned regularly or turned improperly, along with inadequate ventilation, may also cause mid-term embryo deaths. 3. Late-stage mortality (days 13 to 18) is commonly linked to poor breeder nutrition, such as a deficiency in vitamin B12. A small air cell, excessive humidity, or signs of congestion in the embryo suggest periods of high temperature. If the embryo shows weak development, it might indicate low temperatures. A small head or improper positioning, such as the head being up, could also be a factor, along with poor ventilation. 4. Embryos that suffocate inside the shell are often due to high incubation temperatures and humidity, combined with poor ventilation. Low temperatures after hatching, malformations in the cartilage, abnormal fetal positions, or genetic issues can also lead to suffocation. These problems can prevent the chick from breaking out of the shell successfully. 5. Malnutrition in dead chicks may result from poor feed quality, such as insufficient oyster shell in the breeder’s diet. Diseases in the breeder flock, mucus at the egg's entrance (often caused by high temperature and humidity), or poor ventilation with high carbon dioxide levels between days 20 and 21 can also affect hatchability. Lethal genes, improper head-up hatching, failure to turn eggs during the first 14 days, and high temperatures with low humidity during days 20 to 21 can lead to developmental issues. Additionally, if embryos encounter high temperatures while using proteins, they may not absorb them properly, leading to poor yolk absorption and underdeveloped urine capsules. infrared thermometer for fever,thermometers digital non contact,gun thermometers for medical Shenzhen Urion Technology Co., Ltd. , https://www.urionhealth.com
Causes of embryonic death in various stages of incubation
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