How many times do dogs need to mate to get pregnant? A Step-by-Step Guide

Can dogs get pregnant by two dogs?

How many times do dogs need to mate to get pregnant?

Mother Nature has some aces up her sleeve when it comes to dogs and pregnancy, so lets take a look at what these are.

Could my dog be pregnant by two dogs?

Two factors conspire to give the female the greatest chance of falling pregnant. These are:

  • Sperm can remain viable in the female reproductive tract for around 7 days
  • The female doesnt have to ovulate on the day she is mated to fall pregnant
  • Long story short, theres a lot of flexibility in the timing of fertilization. This gives scope for two (or more) lots of sperm to lurk in the female reproductive tract to fertilize an egg.

    To understand this better lets look at a female dogs estrus, or heat, cycle.

  • She comes into estrus or heat twice a year
  • Each season lasts approximately 3 – 4 weeks
    • The first 7 – 10 days the females vulva enlarges, she bleeds, but she wont stand for a dog
    • The middle 5 – 10 days the female ovulates. This is when she will stand to be mated and may fall pregnant
    • The last 7 – 14 days she slowly comes out of heat
  • Ovulation can occur at any time during that middle period
  • Unfertilized eggs can survive for around 48 hours
  • If two male dogs mate with the female on the same day, its a straight swimming race between the sperm as to which reaches the ovum first and fertilizes it.

    If different males mate with the female on different days, she can fall pregnant by both of them. This is because the sperm survive for days in her tract, and are ready and waiting when she does ovulate.

    How Do You Know If A Dog Mating Is Successful?

    The most obvious sign that a dog mating has been successful is if the female becomes pregnant. You will only know for sure that she’s pregnant anywhere from 20 to 28 days after the dog mating.

    How many times do dogs have to mate to get pregnant?

    This will usually happen twice a year, but it also varies depending on the dog. For some dogs, having three cycles in a year can be normal. The cycles can vary and each cycle can happen at a different time. It can take some time before a dog’s cycle becomes regular.