Yes, the growing female dog will have its first menstrual period from June to August, which lasts about fourteen to twenty days, and then every six months. A female dog is in estrus after menstruation. At this time, the owner needs to find a boyfriend for her pet. If she does not want her pet to have babies, she must stay away from the opposite sex of the same kind. In addition, it is not recommended to breed dogs that are in heat for the first time.