ESTRIOL UNCONJUGATED / FREE (UE3)

What this test checks

Measures free estriol — part of second-trimester pregnancy screening.

Why do people get this test?

Part of quadruple screen for Down syndrome and neural tube defects.

When you should consider this test

• Pregnancy at 15-20 weeks
• Comprehensive prenatal screen
• Doctor requested

How to prepare

No fasting needed.