https://www.pet-happy.com/why-cats-dont-go-in-heat-during-winter/

Jul 27, 2013 ... As we already talked in the previous articles about cat heat cycles, most cats go in heat during the mating season from early spring till early ...

https://www.revivalanimal.com/pet-health/feline-heat-cycles/learning-center

The low light and short length of daylight is a primary factor in suppressing the heat cycles during the winter months. Cats kept indoors may be stimulated to ...

http://www.animalplanet.com/pets/how-long-is-a-cat-in-heat/

May 15, 2012 ... But feline heat cycles, or the period in which cats can become pregnant, are dormant in the short, dark days of late fall and winter, and return in ...

https://vcahospitals.com/know-your-pet/estrus-cycles-in-cats

The estrous cycle in cats occurs seasonally and is variable with the amount of daylight. Most cats become very affectionate, even demanding when in heat.

https://www.thesprucepets.com/heat-cycles-in-cats-555413

May 15, 2019 ... Learn how to identify the signs of a cat's heat or estrus cycle and what it's breeding season means with this helpful guide.

https://www.vetwest.com.au/pet-library/cat-breeding-at-this-time-of-the-year-0

Oestrus cycles begin when female cats reach puberty, which can be as early as 4 ... Exactly when a cat starts coming on heat is determined by a number of ...

http://www.wildanimalpark.org/when-do-cats-go-into-heat/

Cats breed prolifically and are able to breed throughout their lifespan, though ... The estrous cycle is a period when a female cat most receptive to male, and can  ...

https://www.petcoach.co/question/?id=187497

Cats can go into heat quite often. Intact (unspayed) female cats typically go into heat seasonally, spring and fall. Each heat cycle may average about 3 weeks.

https://regalpet.com/pet-health/494-a-cats-heat-cycle

There are five stages in a cat's heat cycle; proestrus, estrus, interestrus, ... stage usually lasts two to three months, and normally occurs during the winter time.

https://catveteran.com/cats-in-heat/

What is really happening during your cat's heat cycle? ... between the months of January and September but fewer (if any) heat cycles during the winter months.