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Comparison of prenatal anti‐D titration testing by gel and tube methods: A review of the literature

Antenatal titration testing is traditionally performed using a manual tube test. Tube testing has limitations; it is a manual, time‐consuming method with wide interobserver variability. Gel‐based testing is an attractive alternative because it is more precise and can be automated. This study's objective was to summarize the published literature that assessed the relationship between titrations performed by tube and gel for anti‐D alloimmunized pregnancies.