Celiac Disease and Pregnancy: What Changes, What Doesn't

Most people with celiac disease are women, often diagnosed between twenty and forty. So the question comes up naturally, and the internet serves it badly: what does celiac disease change about a pregnancy? The answer hangs on a single word: treated.

Treated or not: the only distinction that matters

Celiac disease that is diagnosed and followed, with a strict gluten-free diet, does not complicate a pregnancy. Studies comparing women with celiac disease on the diet to other women find no notable difference in fertility, how the pregnancy goes, or birth weight.

Undiagnosed celiac disease, which is the situation of most people who have it, as we explain here, is another story. It is associated with:

• difficulty conceiving, and irregular cycles;
• an increased risk of miscarriage;
• babies with lower birth weight, and more premature birth.

The mechanisms are those of the disease itself: chronic inflammation, and above all deficiencies, iron, folate, zinc, that the body needs in order to conceive and to carry a pregnancy. A gluten-free diet, by repairing the gut, brings these risks back to the general level. That is why unexplained infertility and recurrent miscarriage are recognized reasons to test for celiac disease, with a simple blood test, while continuing to eat gluten until the tests are done, otherwise they cannot give an answer.

The deficiencies to watch closely

Pregnancy increases the need for several nutrients that celiac disease, precisely, makes harder to absorb. Care during a celiac pregnancy therefore adds to the usual monitoring a particular attention to:

• Folate (vitamin B9). Essential from before conception for the formation of the baby’s nervous system. It is absorbed in the jejunum, which the disease affects. The supplement recommended to every woman planning a pregnancy matters all the more here, and the doctor sometimes adjusts the dose.
• Iron. Anemia is the most common symptom of celiac disease, and pregnancy deepens the demand. Blood tests early in pregnancy, a supplement if needed.
• Vitamin D and calcium. For the mother’s bones, often weakened at diagnosis, and for the baby’s.
• Vitamin B12 and zinc, more rarely.

None of this is alarming: these are tests that already exist in routine pregnancy care, done a little more attentively. A woman with well-managed celiac disease has an ordinary pregnancy, with a few extra blood tests.

The diet over nine months

It does not change: strict, as usual. There is no “pregnancy allowance”, in either direction. What can change is daily life:

• First-trimester nausea pushes you towards plain foods, crackers, toast, dry biscuits, so the gluten-free versions need to be within reach. Rice, potatoes, apple sauce and bananas do the same job with no label to read.
• Cravings and meals away from home multiply; the habits stay the same (eating out, cross-contamination).
• Pregnancy supplements are read like any product; wheat starch is rare in them but the leaflet is what counts.
• The maternity ward: the meal after the birth and the days that follow are worth preparing in advance, as for any hospital stay. Tell them when you register, and bring enough to get by.

Breastfeeding

No restriction. Breast milk contains no gluten, whatever the mother eats, and a mother with celiac disease passes on neither the disease nor gluten by breastfeeding. Her nutritional needs stay high while breastfeeding, and monitoring for deficiencies continues for a few months.

Whether breastfeeding protects a child against celiac disease was debated for a long time; recent studies find no clear effect, in either direction. Breastfeeding is a decision to make for other reasons.

Gluten for the baby, and testing

This is the question that worries parents most, and the answer is simple. European pediatric guidelines (ESPGHAN) are clear: gluten is introduced between 4 and 12 months, as for any child. Delaying it does not protect, bringing it forward does no harm: the timing of introduction does not change the risk of developing the disease.

What matters is testing. A child whose parent, brother or sister has celiac disease has a risk of around 10 % of being affected, against 1 % in the general population. A blood test is therefore offered during childhood, on the pediatrician’s advice, often around age two or three and repeated if needed, or as soon as a sign appears. We describe the signs in children here. The genetic test can also help establish whether a child can, or cannot, develop the disease.

In short