Expectant mother fortune-telling

Why can't pregnant women tell fortune?

I have never heard of the saying that everyone can tell fortune, but some places may say that because a pregnant woman is not alone, she has a little magical treasure in her stomach. He is a fortuneteller for two people. He can only tell one person's fortune, but not two people at the same time.

Of course, you should know that fortune telling is a feudal superstition and unreliable.