How do grizzly bears reproduce?

Answer 1

It's a long winter in the cave with nothing else to do...
Grizzlies mate in the spring, and like members of the weasel family, experience delayed implantation, whereby the fertilized egg will float freely in the uterus for several months. Come autumn, if she is healthy, it will implant and begin to develop. They give birth to between 1 and 4 tiny cubs (usually 2) while in their winter den. In most populations, the cub will remain with the sow for one year, den with her the following winter, and be evicted in their second summer. In the central Canadian Rockies, research suggests that some cubs may remain with their mother for 3 or even 4 years. Since the sow will not mate until her cubs leave, this can greatly impact her frequency of reproduction.