Smaller breeds can become sexually active from six months, with some females having their first
heat cycle slightly earlier, at four months.
Not exact matches
There is a
slightly increased risk of mammary cancer if a female dog has one
heat cycle.
Gradual disappearance of vulva swelling: Most of the swelling is gone within one week's time, but the vulva may remain
slightly enlarged after the first
heat cycle has taken place.
Spaying during a
heat cycle presents a
slightly higher risk of complications.
The sun's actual
heat output varies
slightly in a cyclical way, with sunspot activity waxing and waning over an 11 year
cycle, but despite careful measurement, that has been done for well over 100 years, there's no significant long term change in the sun's
heat output.