I believe everyone knows that dogs grow differently from humans. Their lifespan is only more than ten years, which is only one-seventh of humans. As you can imagine, the time they stay with their owners is very short, so the owners must take good care of them and know some of their growth stages, such as how many months do puppies take to become sexually mature, etc.
Generally speaking, most puppies between 1 and 6 months old mainly develop internal organs. Therefore, by the end of June, when the reproductive system is fully developed, sexual maturity may begin to appear. Of course, some breeds of puppies may come later, but they generally show signs of estrus between 6 and 12 months old.
In addition, female dogs will go into estrus every six months. Breeding is not recommended for the first time in estrus. When a male dog shows signs of estrus, it means that he is ready for breeding. He can stimulate estrus anytime and anywhere, and there is no such thing as an inter-estrus period.
Warm reminder: It is recommended that owners wear menstrual pants for their dogs when they are in heat to avoid being "harassed" by other dogs.