This sounds vaguely familiar. It seems to fall into the category of farfetched influences on the pregnant female having an effect on the infant.

The main version of this in Waterbury, CT, where my ex grew up and my in-laws lived, was the old "frightened by a mouse" tale. This said that if the pregnant woman was, for example, frightened by a mouse, the child would have a birthmark shaped like a mouse somewhere on its body. This mindset was found mainly among the Italian and Polish communities, but that didn't keep it from being adopted by the German and Irish groups, of which my in-laws were members.

Strange stuff.

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