No, that wasn't it, LOL. Female plumbing is complicated enough as it is, and I wasn't sure that I wanted to know how an egg could get from the tubes to the abdomen. Sounds reasonable enough (I guess).
The fallopian tube fans out at the end, clasping the ovary like your hand loosely clasping an egg. Normally the ovum is directed into the tube (corresponding to your arm in this picture) and travels to the uterus, but sometimes it gets into the abdomen. (After fertilization, or do the sperm swim after it?)
I read about one woman who had an ovary but no tube on the right side and a tube but no ovary on the left side - an ovum crossed her abdomen, entered the tube, and she had a normal uterine pregnancy.
Actually it is not that hard considering the fallopian tubes are not directly attached to the uterus and they hang loosely around the ovaries.
Moreover, from a biological standpoint, I am surprised that ectopic pregnacies are not more common than they are.