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if you mean dog, then its when a dog (female) has a period. this is usually called 'being in heat'. this should last roughly 3 weeks. during those weeks you can breed your dog (female) with another dog (male). It is best to breed the dog during her 2nd week of heat.

you can get special pants/knickers for your dog so she doesnt leave blood on the floor.

During those 3 weeks, the area of your dogs vagina should swell up and bleed

you can get special pants/knickers for your dog so she doesnt leave blood on the floor

If you mean human, then its when you are starting to menstruate (get your period) is a major milestone of puberty and means that you can now become pregnant. You can expect to have a period every month until well into middle-age. As a woman releases an egg each month, the lining of her womb becomes thicker to prepare itself for pregnancy. This is known as the menstrual cycle. If the egg is fertilised, this lining will then gently cushion the egg as it develops into a baby. If the egg is not fertilised, both the egg and lining leave the woman's body through the vagina - and this is what causes the bleeding you experience during your period.

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14y ago

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