Trigger warning: The following article contains language about miscarriage and pregnancy loss.

Despite popular belief, any pregnancy can end spontaneously.

Usually, though, a miscarriage’s cause remains unknown.

Man comforting sad woman

This leads to the question: Just how common are miscarriages?

Miscarriages occur frequently

Miscarriages happen far more often than you might think.

Evolutionary geneticist William R. Rice has studied this topic carefully.

Man comforting sad woman

He concluded that miscarriage is the end result for more than half of all fertilized eggs.

He toldNew Scientist, “It’s not an abnormality.

It’s the norm.”

Older woman comforting younger woman

I got a vulnerability hangover every time I told the story."

Discussing the topic has become even more fraught recently in the wake of the Supreme Court’sRoe v. Wade reversal.