According to a recent study in the Journal of Clinical Endocrinology and Metabolism, sleep apnea during pregnancy could pose significant risks to more than just the pregnant mother. The study found that expectant mothers who had sleep apnea had higher levels of blood glucose, which in turn affected infant growth patterns both in and out of the womb.

Unfortunately, these growth patterns often resulted in problems later in the unborn baby’s life, such as childhood obesity.

It seems like baby predictors and pregnancy wives’ tales are a dime a dozen. The ring test, the Chinese Gender Chart and even the Internet favorite "nub theory" are all fun ways people can try to predict whether they’re pregnant or not, or what the gender their baby might be. But now a new trend is making the rounds, and it could be setting you up for a lot of confusion.