Geography: Brown bears are the most widely distributed bears in the world. They are found in North America, Europe, and Asia. Two subspecies of brown bear are native to North America: the grizzly bear (U. a. horribilis) and the Kodiak bear (U. a. middendorffi).
Tubal ligation. 1  There is a slight risk of becoming pregnant after tubal ligation. This happens to about 5 out of 1,000 women after 1 year. 2  Pregnancy may occur if: The tubes grow back together or a new passage forms (recanalization) that allows an egg to be fertilized by sperm.
Ectopic Pregnancy: Symptoms, Causes, Risks and Treatment. An ectopic pregnancy occurs when the fertilized egg attaches itself in a place other than inside the uterus. Almost all ectopic pregnancies occur in the fallopian tube, and are thus sometimes called tubal pregnancies. The fallopian tubes are not designed to hold a growing embryo; thus, the fertilized egg in a tubal pregnancy cannot develop properly and must be treated. An ectopic pregnancy happens in 1 out of 50 pregnancies.