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Effect of suckling on postpartum reproductive activity in zebu, criollo and F1 (zebu X Holstein-Friesian) cows in the humid tropics in Mexico



Effect of suckling on postpartum reproductive activity in zebu, criollo and F1 (zebu X Holstein-Friesian) cows in the humid tropics in Mexico



Veterinaria, Mexico 15(4): 243-248



85 cows were (1) suckled by their calves for 5 h daily (traditional method) until weaning at 182 days of age, (2) suckled by their calves for 30 min in the morning and 30 min in the afternoon for 6 wk, after which calves were allowed to suck for 30 min in the morning only until weaning at 182 days of age, (3) as for group 2, except that calves were weaned at 10 wk of age, or (4) separated from their calves at 4 days after calving, and calves were reared artificially.

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