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2. Canine reproduction - Wikipedia

   en.wikipedia.org/wiki/Canine_reproduction

   Only during estrus will copulation result in pregnancy. During proestrus and estrus, females may have a clear, blood tinged, or bloody discharge. Dogs during these stages are often informally referred to as being in heat. The length of these cycles varies greatly among breeds and even between individuals of the same breed.

3. Estrous cycle - Wikipedia

   en.wikipedia.org/wiki/Estrous_cycle

   Female dogs bleed during estrus, which usually lasts from 7–13 days, depending on the size and maturity of the dog. Ovulation occurs 24–48 hours after the luteinizing hormone peak, which occurs around the fourth day of estrus; therefore, this is the best time to begin breeding.

4. Oogenesis - Wikipedia

   en.wikipedia.org/wiki/Oogenesis

   Oogenesis (/ ˌ oʊ. ə ˈ dʒ ɛ n ɪ s ɪ s /) or ovogenesis is the differentiation of the ovum (egg cell) into a cell competent to further develop when fertilized. [1] It is developed from the primary oocyte by maturation.

5. List of dog diseases - Wikipedia

   en.wikipedia.org/wiki/List_of_dog_diseases

   Lymphangiectasia is an intestinal disease of dogs characterized by chronic diarrhea and loss of proteins such as serum albumin and globulin. It is considered to be a chronic form of protein-losing enteropathy. Breeds commonly affected include the Soft-Coated Wheaten Terrier, Norwegian Lundehund, Basenji, and Yorkshire Terrier. [6]

6. Maternal effect - Wikipedia

   en.wikipedia.org/wiki/Maternal_effect

   Maternal effect genes [11] are expressed during oogenesis by the mother (expressed prior to fertilization) and develop the anterior-posterior and dorsal ventral polarity of the egg. The anterior end of the egg becomes the head; posterior end becomes the tail. the dorsal side is on the top; the ventral side is in underneath.

7. Long-Time Veterinarian Explains How Dogs Get Parvovirus ... - AOL

   www.aol.com/long-time-veterinarian-explains-dogs...

   It can occur in older dogs that were never vaccinated as puppies, and some studies indicate that adults that get sick and are not treated die about 10% of the time, which is a lot less than the 90 ...