What age is a male dog able to impregnate a female dog?
I hope you are not going to be breeding . Do you have any idea how many millions of dogs and cats are killed every year at shelters and pounds ?Get your dog spayed/ neutered and don't worry about it. That is what responsible pet owners do.
Male dogs can start to produce sperm at 7 months but more commonly at ten months of age. Usually between 18 months and 4 years the male dog will start to reproduce with a female dog. This is providing that the dog is a stud dog.
I believe around 6 months old!
Around 6months old or whenever his testicles drop.