Best Answer: A non reactive HBsAg (hepatitis B surface antiGEN) tells you nothing about your immunity to hepatitis B, only that you don't currently have the infection. If you are trying to work out if you need hep B vaccination you should check the levels of anti-HBs (hepatitis B surface antiBODY).
You should call the doctor now to make an appointment, they generally dont get you in until your around 8 weeks pregnant... up until your about 7 months pregnant you will only go to the doctor once a month, after your seventh month you will start going about every 2 weeks... when you get around 36 weeks you will start going every week. Good luck with everything! Source(s): 37 Weeks pregnant with a little boy! ~*~Ky Mom~*~ Â· 10 years ago.
Once at 16 - 18 weeks to assess fetal abnormalities, and again at 32 - 34 weeks to assess age and well-being.It is now recommended that all pregnant women have a dating scan in the first trimester-ideally at 10 to 13 weeks of pregnancy-to confirm your dates.