Etiology (/iËtiËÉlÉdÊi/; alternatively aetiology or Ã¦tiology) is the study of causation, or origination. The word is derived from the Greek Î±á¼°ÏÎ¹Î¿Î»Î¿Î³Î¯Î±, aitiologia, giving a reason for (Î±á¼°ÏÎ¯Î±, aitia, cause; and -Î»Î¿Î³Î¯Î±, -logia).
A female dog will generally stay in heat for about three weeks or around 21 days.However, this heat cycle will vary from one dog to the next. It depends on the breed, the age and the dog herself. A female dog will go into heat twice a year. female dog will generally stay in heat for about three weeks or around 21 days.
How Long Do Female Dogs Stay in Heat? Like any species, the fertility cycle of canines can be pretty tricky to navigate. There are two important timing factors to keep in mind: duration and fertility.