Bears in September
The fall is a season of great importance for all bears, but this holds most true for pregnant bears. September represents their last chance to fatten themselves up before retreating to the den where they will bear their young in a matter of months. A pregnant female in the autumn months may consume as much as 90 pounds of food each day, and she can eat more than 200,000 berries in a 24-hour period.
The pregnant female has no choice but to indulge in an eating frenzy at this early stage of autumn, if she wants her pregnancy to continue. Bears experience delayed implantation after mating, which means the fertilized egg will not implant on the uterus wall until the female goes into hibernation. If she has not gained enough weight to allow her to safely begin hibernating by November, the pregnancy will terminate.