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Alpha-thalassaemia.

W C Leung1, K Y Leung, E T Lau

  • 1Department of Obstetrics & Gynaecology, Kwong Wah Hospital, Kowloon, Hong Kong. leungwc65@hotmail.com

Seminars in Fetal & Neonatal Medicine
|April 15, 2008
PubMed
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Alpha-thalassaemia is a common genetic disorder. Couples with alpha(0)-thalassaemia traits face a 25% risk of severe fetal complications, including hydrops fetalis and stillbirth.

Area of Science:

  • Genetics
  • Hematology
  • Reproductive Medicine

Background:

  • Alpha-thalassaemia is a prevalent global genetic disorder.
  • Alpha(0)-thalassaemia trait carriers face significant reproductive risks.
  • Increasing prevalence in Western countries due to immigration.

Purpose of the Study:

  • To highlight the risks associated with alpha(0)-thalassaemia trait.
  • To inform healthcare providers about the disorder's growing presence.
  • To emphasize the need for genetic counseling and screening.

Main Methods:

  • Review of genetic disorder prevalence.
  • Analysis of risks in couples with alpha(0)-thalassaemia traits.
  • Epidemiological data on immigrant populations.

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Main Results:

  • A 25% risk of homozygous alpha-thalassaemia or haemoglobin Bart's disease.
  • Severe fetal outcomes: anemia, hydrops fetalis, stillbirth, neonatal death.
  • Significant maternal morbidity associated with affected pregnancies.

Conclusions:

  • Homozygous alpha-thalassaemia poses severe risks to fetuses and mothers.
  • The disorder is increasingly relevant in non-endemic regions.
  • Screening and counseling are crucial for at-risk populations.