A female dog's heat cycle – how it works

A female dog's heat cycle is a natural process that is necessary for reproduction. Dogs quickly realize when this time has come. During the "heat days," you should therefore be particularly careful if you do not want your female dog to have offspring from a male dog that has wandered into your yard. Conversely, if you want to breed, you need to observe your dog's cycle and take her to the chosen male dog at the right time.

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Understanding the female dog's cycle A few tips on heat and how to handle your female dog
Understanding the female dog's cycle

A female dog may experience her first heat between six and eighteen months of age. This often occurs earlier in smaller breeds than in larger ones. Normally, female dogs go into heat twice a year. The heat lasts about three to four weeks. During this time, the female dog bleeds more or less heavily and goes through different phases: proestrus, estrus, and metestrus.

In the proestrus, the vulva may already be swollen. Egg cells are now forming and the lining of the uterus builds up so that pregnancy is possible. There is a watery to bloody discharge. The female dog becomes more attractive to male dogs. However, she is not yet ready for mating and does not allow contact. Increased urination attracts more males.

With the onset of the estrus phase, the female dog becomes ready to mate. She clearly signals to the male dogs that she is ready to conceive by placing her tail to one side. This phase is also known as the standing heat and lasts about eight to ten days. Ovulation now takes place and several eggs are released into the uterus via the fallopian tubes, where they can be fertilized by sperm over several days. Ovulation is not visible from the outside and occurs approximately two to four days after the onset of readiness to mate. The female dog now bleeds less and the vulva no longer appears as swollen as before.

The post-heat phase can be recognized by the fact that the female no longer allows mating. The vulva swells and there is no more discharge. This phase lasts about 63 days. If the female is pregnant, this period ends with the birth of the puppies.

This marks the beginning of a resting phase of about four months, although the duration of this phase can vary greatly. During this time, the ovaries and uterus regenerate so that the proestrus phase can begin again. This cycle normally repeats itself until the female dog dies, as female dogs do not go through menopause.

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A few tips on heat and how to handle your female dog

Your dog will probably be particularly affectionate shortly before and during her heat. However, she may also try to run away when she is in the heat. Do not let your dog off the leash and make sure that the areas where she is allowed to run freely are sufficiently secure. Sometimes you may even encounter aggressive male dogs who do not care whether a female dog wants to mate or not. It is best to teach your dog to sit on command in such situations.

If she has run away unintentionally, you can have your vet check whether she has been mated. It is then possible to medically terminate the pregnancy. However, this method is not entirely risk-free. Be sure to consult your vet for advice. You can make an appointment directly via petsXL.

The same applies to injections designed to prevent heat. This hormonal intervention can lead to diseases of the uterus and mammary glands. It is therefore advisable to decide in advance whether you want your dog to have puppies or whether spaying might be a more relaxed solution for you.