The gestation period of cattle is generally 270-285 days, with an average of 280 days. The gestation period of buffalo is generally 281-334 days, with an average of 313 days. Cows generally have signs of imminent labor before giving birth.
Pregnant cows in the calf 7-14 days before the calf, the cow's breast rapidly developed and expanded, 2-3 days before childbirth can be extremely inflated and full, at this time can be expressed milk.
One week before giving birth, the vulva swells and translucent mucus flows from the vagina.
1-2 days before delivery, the orthotropic ligament is relaxed, and the sides of the caudal root are obviously sunken.
1-2 days before giving birth, pregnant cows show difficulty in moving, restlessness in standing, tail lifting, frequent urination, and constant review of the abdomen. At this time, special attention should be paid to nursing care and preparation for delivery.