From what day should pregnancy be counted in dogs? - briefly
Pregnancy in dogs is typically counted from the first day of vaginal discharge or mating. This method allows for accurate estimation of the whelping date and proper care during gestation.
From what day should pregnancy be counted in dogs? - in detail
In veterinary medicine, accurately determining the gestation period of dogs is crucial for monitoring the pregnancy and ensuring the health of both the mother and her puppies. The standard method for calculating the gestation period in dogs begins from the first day of diestrus, which typically occurs around 3 to 5 days after the end of estrus (heat).
Estrus, commonly referred to as heat, is the phase during which the female dog is receptive to mating and is characterized by physical signs such as swelling of the vulva and a bloody discharge. This stage usually lasts for about 9 days but can vary between individual dogs. After estrus, the dog enters the diestrus phase, during which the body prepares for potential pregnancy.
Diestrus is the period when the female's hormonal changes promote the development of a fertilized egg and the maintenance of pregnancy. It is essential to note that even if mating does not occur or is unsuccessful, the diestrus phase will still take place. The duration of diestrus can range from 56 to 70 days, with an average of approximately 63 days in most breeds.
Therefore, when calculating the gestation period in dogs, it is recommended to start counting from the first day of diestrus. This approach provides a more accurate estimation of the expected whelping date and allows for better planning and management of prenatal care. It is also important to consider that individual variations may exist, and regular veterinary check-ups can help ensure the health and well-being of both the mother and her future litter.