That only applies if you can find an NHS dentist!
Also, pregnancy can really fuck up your teeth as your body prioritises giving vitamins, minerals and nutrients to the fetus. My teeth were perfect until I started having kids. They started falling apart, literally, not long after the first was born.
When my grandparents' generation were young adults it was not uncommon for women to have all their teeth removed and replaced with dentures while their own teeth were still healthy. They thought it was inevitable, so may as well get it over and done with!