Giant panda is a unique rare animal in China. It is China's "national treasure" and is known as "living fossil". Because of its small number, small number of offspring in a lifetime and difficult survival of larvae, the problem of reproduction has attracted special attention.
Chinese scientists have succeeded in breeding giant pandas by artificial insemination. During natural breeding, giant pandas have one baby, two babies and occasionally three babies. However, almost all the artificially inseminated giant pandas are twins. During estrus, female giant pandas have a large number of follicles, which overlap into blocks and empty out of the ovarian surface. From some biochemical results, it is considered that giant pandas generally lay double eggs, or even more. Moreover, the two eggs may not be discharged at the same time, but may be separated by 20 or 30 hours.
Artificial insemination makes the giant panda give birth to two cubs per fetus, which is to restore its original ecology and contains the meaning of atavism. It could have been two or even three cubs per fetus. Due to the change of ecological environment, life is becoming increasingly difficult and the nutrition is not enough, so it is gradually transformed into one cub per fetus; In addition, it is also related to the number of mating. Natural mating, the female and the same male can mate several times in a few hours, and the sperm has less chance to encounter two eggs. Artificial insemination is carried out once a day for several days. Moreover, the semen quality is good and the amount is large, which increases the chance of multi egg fertilization.
[giant panda breeding and growth record]
1 just born
2 have not opened their eyes
3 play around
4 stroll around
Bathe the panda
Amuse the panda
Teach the panda to walk
Take the panda to find food
The problem of artificial insemination pregnancy of giant pandas is twins, which needs to be further explored. With the solution of this problem, the fertility of giant pandas will be further improved, so as to make the panda family prosperous.