A recent study shows a troubling number of women use marijuana during pregnancy.

Marijuana has been shown time and time again to hurt pregnant women, unborn children, and newborns. It also is believed to harm female fertility and increase chromosome errors.

In October, researchers from the University of Michigan released a study showing at least one in six pregnant Michigan women uses marijuana. Researchers noted that the number may be as high as one in four in some parts of the state.

The study published in Addiction relied on health data from more than 1,000 women at 20 clinics serving 11 hospitals across Michigan.

A growing body of scientific research shows marijuana is dangerous.

Marijuana use has been tied to deadly heart problems, such as heart attack, heart failure, and stroke.

Researchers say marijuana doubles a person’s risk of death from heart disease.

And heavy marijuana use is strongly linked to an increased risk of oral cancer as well as head and neck cancers.

All of this underscores what we have said for years: Marijuana may be many things, but “harmless” simply is not one of them.

Articles appearing on this website are written with the aid of Family Council’s researchers and writers.