Can Celiac Disease Delay Your First Period?

In some girls, it appears that celiac disease can delay that first period, although all studies haven't found such a link. Also, there are lots of possible reasons for your first period to be later than it is in your friends, so a delay (especially a short one) certainly doesn't mean you absolutely have celiac disease.

However, celiac disease is one possibility if you don't get your first period on time, especially if you've got other symptoms or there's a family history of the condition. Read on for the details.

Let's get the technical stuff out of the way first:

"Menarche" means the actual date of a girl's first period, not when you first hit puberty. Puberty in girls actually starts about two to two-and-a-half years before menarche — at around age 10-and-a-half in most girls.

In the U.S., most girls get their first periods by the time they're 13 years, nine months old — in fact, the average age is closer to 12-and-a-half years old.

But girls with undiagnosed celiac disease seem to get a late start, at least in some research reports. For example, in one study, girls who were later diagnosed with celiac disease started their periods at a significantly older age than their non-celiac peers — at 13.6 years, compared to 12.7 years for girls who didn't have celiac. Another study found an even later average age of menarche for celiac girls: 16.16 years.

Some researchers blame malnutrition from untreated celiac disease or malabsorption of important nutrients for delayed menarche, while others say that gluten itself could be having some unknown effect on girls, possibly involving their hormones.

However, other researchers haven't found a definitive link between late first periods and celiac disease. For example, a major study involving Italian women with celiac reported that the average age of first periods of those celiac women was similar to the age for non-celiacs.

There are several steps you can take if you think undiagnosed celiac disease might be delaying your (or your daughter's) first period.

First, check out this guide to delayed puberty to see if there's really a problem. If there aren't obvious signs of puberty by around age 14, you might want to investigate further.

If you have a family history of celiac disease or celiac disease symptoms, you might want to consider asking for celiac blood tests. You might be thinking that most celiac symptoms are digestive in nature, but that's not true at all—in children and teens, especially, constant irritability can be a sign (although I admit it can be difficult to tell what irritability is weird and what's actually normal with a teenager!).

Delayed puberty can be caused by a wide range of conditions, including thyroid disorders or chronic diseases such as diabetes (both of which also are closely linked with celiac disease, of course). If you're concerned that your late first period might be due to celiac disease, your best bet is to schedule a full physical.