“I lost a tooth for every baby” — I hear versions of this from patients often, usually passed down from a mum or grandmother. The belief that a growing baby draws calcium straight out of your teeth, leaving them weaker, is one of the most persistent myths in dentistry. It’s also, happily, not true. But pregnancy does change your mouth in real ways, and understanding what’s actually going on is the key to coming through it with your teeth and gums in good shape.
The calcium myth, cleared up
Your teeth aren’t a calcium reserve the body dips into. Once enamel has formed, the calcium in your teeth is locked in and stable — it isn’t released back into your bloodstream to supply a developing baby the way the calcium in your bones can be. So a baby cannot “suck the calcium out of your teeth.”
Where does the baby’s calcium come from, then? From your diet, and if needed, from your bones — which are designed to give some up and then recover afterwards. Teeth simply aren’t part of that system.
So why did generations of women genuinely lose teeth during pregnancy? Because pregnancy makes your mouth more vulnerable in other ways — and without good care and access to a dentist, small problems were left to become big ones. Those reasons are very manageable once you know what to look for.
What pregnancy actually does to your mouth
Hormones make your gums more reactive. Raised levels of oestrogen and progesterone increase blood flow to the gums and make them respond more strongly to plaque. The result — “pregnancy gingivitis” — is red, puffy gums that bleed easily when you brush. It’s extremely common, often showing up around the second trimester, and it’s the single biggest dental issue of pregnancy. Left unchecked, that inflammation can progress to more serious gum disease.
Morning sickness exposes teeth to acid. If you’re being sick, or dealing with a lot of acid reflux, your teeth are repeatedly bathed in stomach acid — which softens and erodes enamel over time, particularly on the backs of the front teeth.
Cravings and grazing change the picture too. More frequent snacking, and a pull towards sweet or carb-heavy foods, gives the bacteria that cause decay a steadier supply of fuel throughout the day.
None of these is about calcium leaving your teeth. They’re all about inflammation, acid, and plaque — every one of which you can do something about.
Looking after your teeth while expecting
Keep up with brushing and cleaning between your teeth. Twice a day with a fluoride toothpaste, and once a day between the teeth, matters even more now that your gums are primed to react. If bleeding gums make you brush more gently or skip areas, that actually allows more plaque to build up — so keep going gently but thoroughly.
Rinse, don’t brush, straight after being sick. Brushing immediately after vomiting scrubs acid-softened enamel and can wear it away. Instead, rinse with water (or a little water with a pinch of bicarb soda to neutralise the acid), and wait about an hour before brushing.
Manage the snacking. Water between meals, and keeping sweet or acidic treats to mealtimes rather than grazing, gives your teeth a chance to recover through the day.
Yes, you can see the dentist while pregnant
One of the most damaging parts of the old myth is the idea that you should avoid the dentist while pregnant. The opposite is true — a check-up and clean during pregnancy is safe, and it’s one of the best things you can do, precisely because your gums need the extra attention.
Routine dental care, including cleans and most necessary treatment, can safely be carried out during pregnancy — the second trimester is often the most comfortable time. Do let us know you’re expecting (and how far along) when you book, so we can tailor your visit. If you’re planning a pregnancy, a check-up beforehand is a great way to sort out any issues in advance.
The reassuring part
Pregnancy doesn’t have to cost you your teeth — that was never really about calcium. It’s about giving your gums a little extra care during a few hormonally busy months, being kind to your enamel around morning sickness, and not skipping your regular visits. Do those things, and there’s every reason to come out the other side with a healthy smile intact.
If you’re expecting, or hoping to be, and it’s been a while since your last visit, we’d be glad to see you.
We’re at 129A Canterbury Road, Blackburn — a short walk from Blackburn Station. You can book online or call us on (03) 8838 8820.