2007-03-22 06:58:45 · 5 answers · asked by gleaming_halo 2 in Pets ➔ Dogs
Hi gleaming_halo!
The canine heat or estrous cycle varies in length. There are four stages of the estrous cycle. The first stage is proestrus, which is characterized by increased follicular activity of the ovary, a stage that is necessary prior to the release of the eggs. Outward signs include vulvar swelling and bleeding. During this time, your dog will be attractive to males but not receptive to them. In general, this stage lasts six to 11 days with an average of nine days. The end of this cycle is noted when your pet becomes receptive to the male and will stand to be bred.
The second phase is the actual fertile phase or estrus. During this time, the discharge becomes more straw-colored to light pink and the vulva, although still swollen, is softer. The female is now receptive to males and will stand for breeding. This stage generally lasts five to nine days. Unfortunately, it can last as long as 20 days and still be normal. Each dog is different and must be monitored closely. The end of this stage is characterized by the female no longer accepting the male.
The last two stages of the estrous cycle are diestrus, a non-receptive time when the corpora lutea, which produce progesterone, are active on the ovary and anestrus. During anestrus there is no ovarian activity. Diestrus and anestrus are lengthy periods: diestrus lasts 56 to 60 days and anestrus is variable, but several months long. Most dogs cycle twice a year.
Jason Homan
2007-03-22 07:48:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
It depends on her breed and size and is this her first heat? if so it may vary! from 1 week to 3 weeks! I work at a vet clinic and we have seen dogs in heat for over 5 weeks not normal but they have been!
2007-03-22 14:33:24 · answer #2 · answered by razorbackgirl95 3 · 0⤊ 0⤋
Usually about 3 weeks. A week going into heat...
a week in actual heat...and a week going out.
About every 6 months.
2007-03-22 14:08:11 · answer #3 · answered by Stupy 2 · 0⤊ 0⤋
It depends on the breed and size of the dog, but it usually lasts about one week.
2007-03-22 14:01:51 · answer #4 · answered by allisoncooke 3 · 0⤊ 0⤋
it's usually 3 weeks......give or take..... all dogs are different when it comes to how heavy they bleed, some need doggy diapers, others just spot lightly.
here's a site with some more info for you
http://ezinearticles.com/?10-Questions-Im-Most-Asked-about-Dogs-in-Heat&id=27237
2007-03-22 14:26:23 · answer #5 · answered by Anonymous · 0⤊ 0⤋