Daylength and breeding in the domestic cat.
A period of extended daylight (more than 12 hours per day) following one of short days induces oestrus. The longer the short-day period, the more pronounced the reaction. This change from short-day to long-day periods can be successfully repeated at least 6 times in a year. However, the number of litters produced per year is largest when a regular 12 h light/dark cycle is maintained.
D000818:Animals; D000830:Animals, Laboratory; D001947:Breeding; D002415:Cats / Q000502:physiology*; D002940:Circadian Rhythm; D004971:Estrus; D005260:Female; D008297:Male; D011247:Pregnancy; D012098:Reproduction; D013472:Sunlight