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Routine Testing Intervals/Schedules

Initial Visit or First trimester visit:

  • Prenatal Panel: CBC, GC/Chlamydia, HIV, Rubella, RPR, HBsAg, UA, Urine culture, Blood type, Rh (D), Antibody
  • First trimester screening between 10 weeks to 13 6/7 weeks of pregnancy
  • Pap smear at 21 y.o and older, if indicated
  • First trimester ultrasound
  • Assess risk factors and if positive risk factors consider:
    • Referral to perinatologist
    • Fully integrated prenatal screening, 1hr GCT, PIH panel, TSH, TB testing, Microalbumin urine or 24hr
  • Vaccine: Flu in season, IMPRESS need for COVID vaccination as early in pregancy as possible
  • Counseling: Diet/Exercise/Meds/Breastfeeding (EVERY VISIT for BF'ing)

14 to 20 weeks:

  • 2nd trimester screening and AFP (15 0/7-19 6/7 weeks)
  • Sono: 2nd TM US (18-24) for anomalies and growth
  • Vaccine: flu in season

20 to 32 weeks:

  • Labs: Repeat CBC and RPR for 2nd TM
  • Glucose Tolerance Test after 24 weeks
  • RhoGam at 28 weeks, after repeat testing for antibodies
  • Vaccines: flu in season, Tdap at 27+ weeks
  • Counseling: Kick count and PTL precautions at 28 weeks onwards

32 to 36 weeks:

  • Vaccines: flu in season, Tdap if not received already
  • Labs: Rpt CBC, GC/chlamydia, RPR during third TM
  • Sono: if needed for placental location
  • Fetal position (vertex or breech)
  • Hospital registration at 34+ weeks
  • Fill out BTL consent in cases of desired sterilization with c-section. Send a copy to  L&D
  • Counseling: Epidural/Lactation/Contraceptives

36 to 40 weeks:

  • Send GBS 
  • Start NST monitoring at 40 weeks
  • Set proper expectations for induction at 38-39 weeks and consider induction at 40-41 weeks


Perinatal Care Chp 6. Page 159

Prenatal Genetic Screening Test