The three stages of a dog's ejaculation occur in a specific sequence during and after mating. Here's when each stage happens:
- First Stage: Pre-Sperm (Clear Fluid)
This occurs right after the male dog penetrates the female. The dog releases a small amount of clear seminal fluid, which acts as a lubricant and helps in preparing the passage for sperm. This phase lasts for a few seconds to a minute.
- Second Stage: Sperm-Rich Ejaculate
This is the most crucial stage for reproduction, as the sperm-rich fluid is released into the female. This stage usually begins shortly after the first and lasts for about 30 seconds to a minute. During this time, the male dog deposits the sperm that will potentially fertilize the female's eggs.
- Third Stage: Prostatic Fluid
After the sperm-rich ejaculate, the dog releases a larger volume of fluid from the prostate gland. This fluid serves to flush any remaining sperm into the female and assist with the sperm's journey through the reproductive tract. This phase begins while the male and female dogs are still "tied" together and can last for several minutes, often continuing throughout the tie, which can last from 5 to 30 minutes.
The "tie" is important because it helps keep the sperm inside the female, increasing the chances of successful fertilization. The third stage of ejaculation occurs during this period, and even though mating may seem over, the reproductive process is still ongoing.