First-time cat owners might be surprised if their female cat suddenly starts to exhibit odd behaviors. Meaning behaviors stranger than sitting in tiny boxes for no reason and chasing laser pointers that is. Perhaps she's become more affectionate out of nowhere or start wailing loudly in the middle of the night. Maybe she’s even been wanting to go out more than usual. These are all incredibly common signs of estrus, the feline fertile period also known as heat.
The majority of female cats go into heat—or estrus—by six months, but there are times in which this isn't the case. You might find certain breeds of cat going into heat earlier than others such as Siamese, who may go into heat when they're just four months old. If your cat hasn't yet come into heat by the time they're six months old, that's also nothing to worry about. Some cats can even go up to ten months without experiencing their first heat. It all depends on the individual cat, but 4-10 months is a very plausible benchmark.
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