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[Rh system genotyping in amniotic fluid].

C Cotorruelo1, C Biondi, S García Borrás

  • 1Area Inmunología, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario, Suipacha 531, 2000 Rosario, Argentina. ccottorru@fbioyf.unr.edu.ar

Medicina
|March 27, 2001
PubMed
Summary
This summary is machine-generated.

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This study determined RHD gene presence in fetal cells from amniotic fluid. Fetal RHD genotyping via amniocentesis accurately diagnoses hemolytic disease risk, avoiding unnecessary invasive procedures for RhD- fetuses.

Area of Science:

  • Genetics
  • Molecular Biology
  • Prenatal Diagnostics

Context:

  • Hemolytic disease of the newborn (HDN) is a serious condition.
  • RhD incompatibility between mother and fetus poses a significant risk.
  • Accurate fetal RhD status determination is crucial for managing RhD-negative mothers.

Purpose:

  • To detect the RHD gene in fetal cells from amniotic fluid (AF).
  • To confirm fetal DNA origin and perform RHD genotyping.
  • To assess the utility of fetal DNA genotyping for diagnosing HDN risk.

Summary:

  • 65 AF samples were analyzed, with fetal DNA confirmed using VNTR and STR loci.
  • RHD genotyping was performed on 62 non-contaminated samples using multiplex PCR.
  • 54 RhD+ and 8 RhD- fetuses were genotyped, including those from sensitized RhD- mothers.

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Impact:

  • Fetal DNA genotyping enables early diagnosis of HDN risk from a single amniocentesis.
  • Identifying RhD-negative fetuses allows avoidance of invasive procedures.
  • This method improves prenatal care and reduces maternal-fetal complications.