Pregnancy Chart of Common Prenatal Laboratory Tests

pregnancy chart
TEST: TIMING: SIGNIFICANT VALUE:
  • HCG
Initial Visit Positive
  • CBC
Hct
Hgb
WCT
Initial Visit, 28 and 36 wks
Initial Visit, 28 and 36 wks
Initial Visit, 28 and 36 wks
<32%
<11 g/dl
>15,000 mm3
  • Blood type and Rh
Initial Visit Mother Rh-

Father Rh+
  • Antibody screen
Initial Visit, 28 and 36 wks Positive
  • Serology
Initial Visit and 36 wks Positive
  • Rubella titer
Initial Visit <1.8
  • 1-hr serum glucose
24 to 28 wks >140 g/dl
  • HBsAg
Initial Visit, if indicated Positive
  • Urinalysis
Initial Visit Positive
  • Urine C&S
Initial Visit Positive for infection
  • Urine
Glucose
Protein
Each visit
Each visit
Positive
Greater than 2+
  • Pap smear
Initial Visit Abnormal cytology
  • PPD
Initial Visit Positive
  • HIV
Offer at initial visit Positive
  • Sickle cell screen
Offer at initial visit Positive for trait or anemia
  • Tay-Sachs screen
Offer at initial visit Carrier
  • GC culture
Initial Visit and 36 wks Positive
  • Rh antibody
Initial Visit, 28 and 36 wks Negative
  • MSAFP
15 to 20 weeks >2.0
  • Biophysical profile
Third trimester <8-10

One Response to “Pregnancy Chart of Common Prenatal Laboratory Tests”

  1. Pesola says:

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