The present invention provides a subcutaneous injection product for cattle for inducing superovulation characterized by comprising aluminum hydroxide gel and an efficient amount of a gonadotropin, wherein the concentration of the aluminium hydroxide is, in terms of the amount of aluminum, higher than or equal to 0.2 mg/mL and lower than 1.0 mg/mL, which is a subcutaneous injection product that is useful for producing good calves and that can induce superovulation in a cow by a single administration. The present invention also provides a method for producing good calves undergoing steps of subcutaneously injecting the aforementioned injection product into a cow to thereby induce superovulation, inducing estrus in the cow, conducting artificial insemination, and then collecting fertilized eggs.
