When do male dogs start to heat?

Compared with female dogs, male dogs are more in heat and mature than female dogs. later. Male dogs generally reach sexual maturity and have reproductive ability 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 for male dogs to be paired is usually 2 years old. After the age of 2, it will enter the best time to breed dogs.

2. Male dogs who have never bred, generally have a decline in sexual function at the age of 5 to 6 years, often with dead or inactive sperm, and often empty or dystocia after mating with a female dog, etc. . Male dogs can be mated throughout the year, and the use period can reach 7 or 8 years of age.

3. The penis is the male dog's mating organ, 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 are rapidly congested and swelled. After about 1 hour of ejaculation, the corpus cavernosum shrinks and the penis can exit. Each ejaculation volume is about 10 ml.

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