Prenatal Tests & Screening	When is it done?	Why is it done?
Quantitative serum HcG	5-8 weeks	Viable pregnancy, ectopic, SAB
CBC	1st PN visit, prn	Anemia, infection
Antibody screen	1st PN visit & at 28 weeks if +	Unusual antibodies, mom/baby incompatibilities
Blood type	1st PN visit	Emergency transfusion
RH	1st PN visit	If mom RH- & fetus RH+ could be incompatible. Rhogam at 28 wks, prn chance of mat/fetal bleed
U/A	1st PN visit	Infection: esp asymptomatic
RPR	1st PN visit	Syphilis
Rubella	1st PN visit	Immunity. Offer vaccine postpartum
TB	1st PN visit if at risk	Infection. Can be treated during pregnancy
Hepatitis B	1st PN visit	Infection
TORCH, 5ths disease	1st PN visit prn	Fetal well being
Integrated test: ultrasound, nuchal translucency (NT)	10-13 weeks	Down Syndrome, Trisomy 13 and Trisomy 18
Glucose: 1 hr gtt	24-28 weeks and 1st PN visit if at risk	Gestational diabetes
AFP, triple marker, cystic fibrosis	15-20 weeks	Neural tube defects, Down's, trisomy 18, cystic fibrosis
CVS	10-12 weeks	Chromosomal abnormalities, still needs AFP
Amniocentesis	15-20 weeks	Chromosomal abnormalities
HIV	1st PN visit, 3rd trimester if HR, rapid test in labor	Maternal, fetal well-being
GC/Chlamydia	1st PN visit	Infection
Ultrasound	18-22 weeks (offer), 1st PN visit & prn	Dating, fetal, placental, uterine abnormalities
Pap Smear & possibly HPV	1st PN visit	Cervical Cancer
Group B strep (vaginal)	36 weeks	Prevent meningitis, pneumonia in newborn
Work & environmental hazards	1st PN visit	Teratogens, safety, hours
Alcohol, tobacco	1st PN visit	Fetal teratogens, effects on placental perfusion, maternal well-being
Illicit substance use	1st PN visit	Fetal teratogens, effects on placenta
Domestic Violence	1st PN visit, prn	Maternal & fetal safety
Dietary	1st PN visit, 20 weeks	Maternal & fetal well-being
Dental	1st PN visit	Maternal & fetal well-being
Living situation/homeless	1st PN Visit, prn	Maternal & fetal well-being