After the hen has been incubating the eggs for seven days, the eggs become cold. Can she continue to hatch?

I can't. That's absolutely impossible. Incubation requires temperature. The development of chicken embryo outside the mother's body mainly depends on external conditions, such as temperature, humidity, ventilation, egg transfer and so on. (1) temperature is the most important condition for hatching. Only by ensuring the proper temperature for the normal development of embryos can chicks with high hatching rate and high quality be obtained. 1. Optimum temperature range for embryo development and incubation. Chicken embryo development has certain adaptability to environmental temperature. At the temperature of 35 ~ 40.5℃ (95 ~ 105f), some kinds of eggs can hatch. However, if an electric incubator is used to hatch, the above temperature is not the optimum temperature for embryo development. On the premise of controlling the ambient temperature, the optimal incubation temperature is 37.8℃, namely 10F. The incubation period is 37 ~ 37.5℃. 2. Effects of High Temperature and Low Temperature on Embryo Development (1) High temperature affects the rapid development of embryos, shortens the incubation period and increases the embryo mortality. The quality of chicks decreased. The mortality rate varies with the degree and duration of temperature rise. When the incubation temperature exceeds 42℃, the embryo dies within 2 ~ 3 hours. When the incubation temperature reached 47℃ for 5 days, all embryos died within 2 hours. After 24 hours at 40.6℃ (104f) and 16 days, the hatching rate decreased slightly. After 9 hours at 43.3℃( 1 10F), the hatching rate decreased seriously. 46. After 3 hours at 1℃ or 48.9℃( 120F)1hour, all embryos died. (2) Low temperature affects embryonic development retardation, prolonged incubation period and increased mortality. When the incubation temperature is 35.6℃(96F), most embryos die in the shell. A slight deviation from the upper and lower limits of the optimum temperature will have a smaller inhibitory effect on embryo development after hatching 10, because the temperature of the embryo egg can play an appropriate regulatory role. 3. Variable temperature incubation and constant temperature incubation system At present, there are two opinions on the temperature supply of chicken incubation in China: one advocates variable temperature incubation and the other advocates constant temperature incubation. Both these two incubation temperature feeding systems can obtain high incubation rate. (1) Variable temperature incubation method (stage cooling method) The variable temperature incubation method advocates giving different incubation temperatures according to different incubators, different environmental temperatures (mainly incubation room temperature) and different embryo ages of chickens. The reasons are as follows: ① The hatching rate of natural hatching (brooding chickens) and traditional hatching methods in China is very high, and they are all hatched at variable temperature; ② Embryos of different embryo ages need different development temperatures. (2) The incubation temperature of 265,438+0 days is divided into 65,438+0 ~ 65,438+09 days and 37.8℃; 19 ~ 2 1 day, 37 ~ 37.5℃ (or according to the incubation temperature recommended by incubator manufacturer). In general, constant incubation ratio is adopted in both stages, and the temperature of the incubation room must be kept at 22 ~ 26℃. Below this temperature, waste gas, hot air or stove should be used for heating; If the room temperature is unconditionally increased, the incubation temperature should be increased by 0.5 ~ 0.7℃; Above this temperature, open the window or mechanically exhaust (or even manually send cold air) to cool down. If the cooling effect is not ideal, we can consider reducing the incubation temperature appropriately (by 0.2 ~ 0.6℃).