Anticipated Prenatal Testing Schedule



1st trimester:

  • Abdominal/Vaginal ultrasound at approx 7 – 9 weeks to determine dates

  • First OB visit soon after sonogram with MD. (Complete exam including PAP smear)

  • Prenatal Blood Work – Prescription given for patient to go to lab that is insurance appropriate

  • Appointments will be every 4 weeks with MD or nurse, unless otherwise needed

  •  1st trimester prenatal screening (ultrascreen, nuchal translucency, evaluates risk for down syndrome and trisomy 18), to be done between 12 weeks and 13 weeks 6 days. 

  • If indicated, non-invasive prenatal testing (MaterniT21) can be done after 10 weeks. This is a blood test that checks DNA for trisomies.

  • Pap, Gonorrhea and Chlamydia Cultures


2nd Trimester:

  • Prenatal screening done at about 16 weeks – AFP Quad/Sequential Screen  - blood drawn at OB office (evaluates risk for neural tube defects, downs syndrome, and trisomy 18)

  • Appointments will continue at every 4 weeks with MD or nurse, unless otherwise needed

  • Level II Sonogram done between 19 and 22 weeks, by appointment only

  • Glucose and Complete Blood Count drawn at OB office at 26 – 28 weeks

  • Other tests may include an amniocentesis, fetal echocardiogram, extra blood tests if indicated


3rd Trimester:

  • Appointments will be every 2 weeks with MD or nurse,beginning at 32 weeks, then once a week beginning at 36 weeks, unless otherwise needed

  • Growth sono to be done at 32 – 35 weeks by appointment only

  • Group B Strep culture to be obtained at about 36 weeks during routine weekly visit.

  • Repeat HIV test at 36 weeks as recommended by CDC and NYSDOH

  • More blood tests, sono’s and/or Biophysical Profiles may be done if indicated


Anticipated OB appointment schedule breakdown: (may be adjusted due to clinical situation and patient needs)

7-8 weeks - new OB sono

Approx. 8 weeks - MD visit (after sono has been obtained)

Approx. 10 - 12 weeks - Non-invasive prenatal testing (MaterniT21) if indicated

12 weeks - 13 6/7 weeks - Ultrascreen

After ultrascreen - MD visit

16 weeks- Sequential screen, Nurse visit

20 weeks - Level II Sono and MD visit

24 weeks - Nurse Appointment

28 weeks -Nurse Appointment

32 weeks - Growth sono and MD visit

34 weeks - Nurse Appointment

36 weeks - Nurse Appointment (Group B strep culture and HIV test)

37 weeks and beyond -MD appointments