Baby teeth begin developing in the womb at around 6 weeks of pregnancy, and permanent teeth start at 20 weeks. Maternal nutrition, medications and dental infections during pregnancy directly influence how your child's enamel forms.
Good news: safe routine dental care in pregnancy is not just OK — it is recommended. The American College of Obstetricians and Gynecologists explicitly endorses cleanings, fillings and X-rays with a lead apron during any trimester.
Milestones
- Weeks 6–8: baby-tooth buds form
- Week 20: permanent-tooth buds form
- 3rd trimester: enamel calcification
Key risks at this stage
- Untreated maternal cavities transfer bacteria to baby after birth
- Severe pregnancy gingivitis linked to preterm delivery
- Certain antibiotics (tetracycline) can stain baby's teeth
Parent tips that actually work
- Book a dental cleaning in the second trimester
- Take 600 mcg folate + adequate calcium daily
- Rinse with baking-soda water after morning sickness
- Avoid tetracycline antibiotics
Red flags — see a dentist
- • Facial swelling or throbbing tooth pain — treat, don't wait
- • Bleeding gums that persist despite brushing