Lab
Prenatal Lab
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Prenatal Lab
Initial Labs
Gene
ral
Complete Blood Count
Hemoglobin
Platelets
Urine sample
Urinalysis
Urine Culture
Blood Type
ABO and Rh
Antibody
screen (
Coombs
test)
Rubella
Antibody
MMR contraindicated during pregnancy
Administer postpartum MMR if negative
Screen prior to pregnancy and immunize if negative
Syphilis Serology
(RPR)
Hepatitis B Surface Antigen
(
HBsAg
)
If at risk,
Hepatitis B Vaccine
(safe in pregnancy)
Pelvic Exam Initial Labs
Gonorrhea Culture
or
Gonorrhea Antigen
Chlamydia Antigen
Pap Smear
HIV Test
Consider
Thyroid Stimulating Hormone
(TSH) in all women
Initial Labs
Specific risk factor directed tests
Group B Streptococcus Culture
Culture both vagina and anus
Sickle Cell Anemia
or
Sickle Cell Trait
screen
Predisposes to
Pyelonephritis
Glucose Challenge Test
(50 g Glucola drink)
Hepatitis C Antibody
If no maternal history of Varicella infection
Obtain varicella zoster IgG and if negative
Avoid Varicella exposure
If exposed, consider varicella
Immunoglobulin
Offer postpartum
Varicella Vaccine
Wait 3 months after last
RhoGAM
shot
Varicella Vaccine
is contraindicated in pregnancy
Screen prior to pregnancy and immunize if negative
Second Trimester Labs
16-18 weeks
See
Triple Analyte Screen
Consider first trimester screening of trisomy 16, 18
Urine Culture
Third Trimester Labs
26-28 weeks
Glucose Challenge Test
(50 g Glucola drink)
Hemoglobin
If Rh negative mother
Repeat
Antibody
screen (
Coombs
test)
Administer
RhoGAM
300 mcg after blood draw
If mother at risk for
Sexually Transmitted Disease
Repeat RPR for
Syphilis Testing
Repeat
Gonorrhea Culture
or
Gonorrhea Antigen
Repeat
Chlamydia Antigen
Repeat
Hepatitis B Surface Antigen
(
HBsAg
)
Repeat
HIV Test
If high risk for
Preterm Labor
Consider
Bacterial Vaginosis
screening
Consider
Fetal Fibronectin
Third Trimester Labs
35-37 weeks
Group B Streptococcus
screening
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