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Some of you may find this interesting others may already have the knowledge of a Black Bears breeding process... Black bears mainly mate in May and June and give birth in Jan. or early Feb. At birth the average bear cub is 11 ounces... Yes you heard me right 11 ounces... An animal that can reach 800+ pounds in some areas gives birth to an 11 ounce cub after being bred almost 8 months ago???? The reason is black bears have whats called "DELAYED IMPLANTATION".... The seed got fertilized in May or June but floats around in the sow till approx. Nov. "DORMANT"... At which time it attaches to the uterine wall and the cubs start to grow for approx. 45-60 days giving birth in Jan. or early Feb....