The control of the nutrition of the cow is very helpful for reproduction. Excessive and unhealthy will have an adverse effect on reproduction.
In the case of overnutrition, breeding cows are prone to becoming obese and manifest as dystocia.
Malnourished cattle are emaciated, have no estrus, or have a pregnancy interruption after conception; yak calves produced by pregnant cows with poor lyrical status are weak and have very low body weight.
The insufficient supply of energy and nutrients has a great influence on the mating of pregnant cows after childbirth, manifesting as not having estrus or being pregnant after mating. Cows with too low levels of protein during pregnancy will reduce the reproductive rate, or the weight of the newborn calf, or the cow will not heat for a long time after delivery.
The lack of quantitative elemental iodine can cause reproductive problems, production of weak warts, stillbirths, or yak neck enlargement (goiters). The lack of vitamin A in the nutrition of the pregnant female animal results in weak warts or deformities, and amblyopia or cub death.
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