When does a male dog start going into heat?

Compared with female dogs, male dogs come into heat and mature later. Male dogs generally cannot reach sexual maturity and have the ability to reproduce until they are 10 to 22 months old. At the same time, male dogs should not be bred too early and should wait until sexual maturity reaches a certain level.

1. The best time to breed a male dog is usually 2 years old. The best time to breed a dog is after 2 years old.

2. The sexual function of male dogs that have never been mated usually declines when they are 5 to 6 years old, and dead or inactive sperm often appear. After mating with female dogs, they often become pregnant or have dystocia, etc. Male dogs can be mated throughout the year and can be used until they are 7 or 8 years old.

3. The penis is the mating organ of male dogs. It is about 8 cm to 10 cm long. It can be inserted into the vagina without erection during mating. When the penis is inserted into the vagina, the corpus cavernosum of the urethra and the corpus cavernosum of the penis rapidly become congested and expanded. After ejaculation ends in about an hour, the corpus cavernosum of the penis shrinks and the penis can exit. The volume of each ejaculation is approximately 10 ml.

4. Semen includes sperm and sperm: Sperm are flagellated cells, about 60 microns in length, and divided into three parts: head, neck and tail. Sperm has a long survival time and can generally survive for 90 hours in the body of a female dog.