Nutritional deficiency: - Nutritional deficiency is seen in most the animals, which comes due to the animal not getting complete food, due to lack of minerals and lack of vitamins in the diet, the animal does not develop properly, due to which The development of genitals takes place on time or not. Due to this the hormones are also not secreted properly and the animal has difficulty conceiving. There are many reasons for this too, the heat of the animal is not detected, and the animal does not show leakage. It does not speak, due to which the animal husband is not able to get artificial insemination (AI) or conception in time. Even if she gets pregnant, she will not be able to stay in the uterus.