Hi mama! Those are thyroid function tests na sinusuri ng OB mo para siguruhing okay ang thyroid mo during pregnancy, FT3 at FT4 measure ang actual thyroid hormones in your blood, and TSH checks if your pituitary gland is working properly to regulate them, kaya important talaga ito especially when pregnant dahil thyroid problems can affect baby. A few of my mum friends had these done din during pregnancy at totally normal lang, so don't worry too much, basta complete ang bloodwork at makikita ng doctor what's going on. Since you have questions about what exactly the results mean, definitely ask your OB to explain the results once they come out, kaya niya yan i-break down para sa'yo in a way na maintindihan mo!