Search results
Results From The WOW.Com Content Network
More developed infants will typically require a longer gestation period. Altricial mammals needs less time to gestate compare to the precocial (well-developed neonate) mammal. A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [20]
Canine sperm can live for 10 to 11 days [22] in the oviducts (fallopian tubes) so if a female is bred 10 days before the oocytes (eggs) can be fertilized, she will appear to have a gestation length of 70 days. If she is bred on the day the oocytes can be fertilized, her gestation length will appear to be 60 days long.
Balancing ease of lambing with high productivity is one of the dilemmas of sheep breeding. [7] While the majority of births are relatively normal and do not require intervention, many complications may arise. A lamb may present in the normal fashion (with both legs and head forward), but may be too large to slide out of the birth canal. This ...
Birth is termed whelping in dogs. [12] Among dogs, as whelping approaches, contractions become more frequent. Labour in the bitch can be divided into 3 stages. The first stage is when the cervix dilates, causing discomfort and restlessness in the dog. Common signs of this stage are panting, fasting, and/or vomiting. This may last up to 12 hours ...
Puppies are born after an average of 63 days of gestation, emerging in an amnion that is bitten off and eaten by the mother dog. [7] Puppies begin to nurse almost immediately. If the litter exceeds six puppies, particularly if one or more are obvious runts , human intervention in hand-feeding the stronger puppies is necessary to ensure that the ...
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. Proestrus bleeding in dogs is common and is believed to be caused by diapedesis of red blood cells from the blood vessels due to the increase of the estradiol-17β hormone. [20]
The dog (Canis familiaris or Canis lupus familiaris) is a domesticated descendant of the gray wolf.Also called the domestic dog, it was selectively bred from an extinct population of wolves during the Late Pleistocene by hunter-gatherers.
The dogs work in groups; three or four dogs are an adequate defense against wolves and stray dogs. Their function is mostly one of dissuasion, actual physical combat with the predator being relatively rare. [19] Nevertheless, working dogs may be fitted with a roccale (or vreccale), a spiked iron collar which protects the neck in combat. [19]