Routine Lab Testing for Normal Pregnancies First Trimester Unless Otherwise Indicated

• Human immunodeficiency virus

• Purified protein derivative (PPD) test for tuberculosis

• Venereal Disease Research Laboratory (VDRL) slide test for syphilis

• Rubella immunity

• Cervical cytology

• Hepatitis B surface antigen

• Hepatitis C antibodies (if high risk)

• Bacterial vaginosis testing if symptomatic or at high risk (previous preterm labor)

• Antibody screen for Rh antibodies

• Hemoglobin and hematocrit for anemia (repeated at 26-32 weeks)

• Urinalysis with culture for asymptomatic bacteriuria

• Gonorrhea and chlamydia

• Screens for Down's syndrome and neural tube defects (at 15-20 weeks)

• Gestational diabetes screening (at 24-28 weeks)

• Group B Streptococcus screening (at 35-37 weeks) Assessing Suitability of the Cervix for Labor Induction

Suitability is based on cervical dilation, length, consistency, and position. These findings are translated to a numerical rating called the Bishop score. A Bishop score of less than 6 indicates that pharmacologic therapy is needed to ripen the cervix prior to delivery.

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