Your Teeth in Pregnancy: Why a Healthy Mouth Helps Your Baby

As a children's dentist, I often say that the best time to start protecting a baby's teeth is before the baby is born. Pregnancy brings real changes to the mouth, and a mother's oral health can shape her child's risk of cavities in the early years. The good news is that a few simple steps make a big difference.

Why pregnancy affects your gums

Hormone changes during pregnancy make the gums react more strongly to plaque. Many women notice gums that are red, puffy or bleed when brushing. This is called pregnancy gingivitis, and it is very common, often starting in the first few months and peaking later in pregnancy.

It is tempting to brush more gently or avoid the bleeding areas, but the opposite helps:

• Brush twice a day with a soft brush and fluoride toothpaste, angling the bristles gently towards the gumline.
• Clean between your teeth once a day with floss or small interdental brushes.
• Keep sugary snacks and drinks to mealtimes. Pregnancy cravings and frequent small snacks can raise the risk of cavities.

Some women develop a small, red, soft swelling on the gum, sometimes called a "pregnancy tumour". Despite the name, it is not cancer and often shrinks after the baby is born, but it should be checked by a dentist.

Untreated gum disease has been linked in research with pregnancy complications. The link is still being studied, but it is one more good reason to look after your gums now.

Dental check-ups are safe in pregnancy

Routine dental care is safe and recommended during pregnancy. Major health and dental organisations agree that check-ups, cleanings and needed treatment such as fillings should not be postponed just because you are pregnant.

• Tell your dentist you are pregnant and how many weeks along you are, and share any medicines or supplements you take.
• Local anaesthetic for dental treatment is considered safe when used appropriately.
• X-rays are taken only when needed, using modern low-dose equipment and protective measures.
• Many women find the second trimester the most comfortable time for non-urgent treatment, but pain, swelling or infection should be treated whenever it happens. Dental infection is not good for you or your baby.

Morning sickness and your enamel

Stomach acid from vomiting or reflux can soften tooth enamel. To protect your teeth:

1. Rinse your mouth with plain water after vomiting. A rinse of water with a teaspoon of baking soda can also help neutralise acid.
2. Wait before brushing, usually around 30 to 60 minutes, because brushing softened enamel straight away can wear it down.
3. Use a fluoride toothpaste, and ask your dentist whether a fluoride mouthwash is suitable for you.
4. If the taste of toothpaste makes you gag, try a small-headed brush, a mild-flavoured toothpaste, and brushing slowly with your head tilted forward.

How a mother's mouth affects her baby

Babies are not born with the bacteria that cause tooth decay. These bacteria are usually passed on through saliva from the people closest to them, most often parents. When a mother or caregiver has untreated cavities, more of these bacteria can reach the baby, and the child may get cavities earlier.

That is why treating your own cavities and gum problems during pregnancy is a gift to your baby too. After the birth:

• Avoid sharing spoons, cups or toothbrushes with your baby, and don't clean a pacifier with your own mouth.
• Keep up your own brushing and check-ups, even in the busy early months.
• Start wiping your baby's gums daily and brush the first tooth as soon as it appears.

Eating well for two

Your baby's teeth begin forming during pregnancy. A balanced diet with enough calcium, vitamin D and protein supports this. Follow your doctor's advice on prenatal vitamins, choose water as your main drink, and enjoy sweets and dates with meals rather than throughout the day.