Perhaps you can imagine what it was like is like for the following woman. The article I refer to comes from the BBC News World Edition online.
This woman in Iran claims to have given birth to a frog. The paper that published the article claims that experts who have examined the frog says it has human characteristics. Possible explanation given is that while the woman was in dirty water somehow the larva crawled inside.
The frog still has to undergo testing:
But it quotes clinical biology expert Dr Aminifard as saying: "The similarities are in appearance, the shape of the fingers and the size and shape of the tongue."