Difference in Ectopic Pregnancy and Normal Pregnancy

During a normal pregnancy the fertilisation of the egg and sperm takes place in the fallopian tubes. After a few days the embryo moves to the uterus where it grows into a baby. In some instances the embryo does not move to the uterus but continues to grow in the fallopian tube or settles in some other area outside the uterus. 

Ectopic pregnancy refers to a pregnancy where the embryo begins to grow outside the uterus. An ectopic pregnancy in the fallopian tube is also known as tubal pregnancy. The fallopian tube is a delicate structure which cannot support the pregnancy leading it to rupture and cause excessive bleeding.