Reproduction

__Reproductive Behaviors__ Grey wolves tend to mate during the months of January and February. Their gestation period last about 63 days and the litter sizes range from about 4 to 7 pups. When the pups are born they are blind and defenseless and the pack takes care of the pups until they are about 10 months old. "Grey Wolf //(Canis lupus)."// __Defenders of Wildlife__. 

John, owner and operator of Big Run Wolf Ranch states that wolves only breed once a year and the pups are born in mid-April. John also says that the younger wolves around a year old stay back in the den to help with the new offspring while the rest of the pack hunts. (not sure if this is under the correct subtitle) The present study demonstrated the successful cloning of an endangered male gray wolf via interspecies transfer of somatic cells, isolated postmortem from a wolf, and transferred into enucleated dog oocytes. Therefore, somatic cell nuclear transfer has potential for preservation of canine species in extreme situations, including sudden death: These scientists took the somatic cells from a dead wolf and transplanted them into live domestic dog oocytes. Of the 17 recipient dogs, 4 became pregnant. One dog gave birth to 2 dead pups, and the other three dogs delivered 4 pups by c-section. 1 of those 4 pups died, so there were 3 survivors.
 * Oh, H. J., Kim, M. K., Jang, G., Kim, H. J., Hong, S. G., Park, J. E., Park, K., Park, C., Sohn, S. H., Kim, D. Y., Shin, N. S. & Lee, B. C.** 2008. Cloning endangered gray wolves (//Canis lupus)// from somatic cells collected postmortem. //Theriogenology//. **70**, 638-647.