**Core Concept**
The Centers for Disease Control and Prevention (CDC) recommends various screening tests for pregnant women to identify potential health risks and ensure timely interventions. These tests are crucial for preventing complications and ensuring a healthy pregnancy outcome.

**Why the Correct Answer is Right**
The CDC recommends screening tests such as rubella immunity, hepatitis B surface antigen (HBsAg), human immunodeficiency virus (HIV), syphilis, and group B streptococcus (GBS) colonization. However, the CDC does not recommend routine screening for varicella immunity in pregnant women, as it is not considered a significant risk factor in most cases.

**Why Each Wrong Option is Incorrect**
**Option A:** The CDC recommends screening for rubella immunity to prevent congenital rubella syndrome, which can cause severe birth defects.
**Option B:** The CDC recommends screening for HBsAg to identify pregnant women with hepatitis B infection, which can be transmitted to the newborn.
**Option C:** The CDC recommends screening for HIV to identify pregnant women with HIV infection, which can be transmitted to the newborn.
**Option D:** The CDC recommends screening for syphilis to identify pregnant women with syphilis infection, which can cause congenital syphilis in the newborn.

**Clinical Pearl / High-Yield Fact**
The CDC recommends that all pregnant women be screened for GBS colonization between 35 and 37 weeks of gestation to prevent group B streptococcal disease in the newborn.

**Correct Answer: D. Varicella immunity is not a screening recommendation by CDC in pregnant females.**