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Related Experiment Videos

Screening for Down syndrome in the first trimester

K J Powell1, J G Grudzinskas

  • 1Department of Obstetrics and Gynaecology, Royal London Hospital, UK.

Reproduction, Fertility, and Development
|January 1, 1995
PubMed
Summary

First-trimester screening for Down syndrome using maternal serum or ultrasound may offer an earlier detection alternative to current second-trimester methods. Research explores the feasibility of these novel approaches for improved early diagnosis.

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Area of Science:

  • Prenatal Diagnosis
  • Maternal Serum Screening
  • Fetal Ultrasound

Background:

  • Second-trimester screening for Down syndrome is established but samples are taken late (after 15 weeks).
  • First-trimester pregnancy-associated proteins and hormones may differ between normal and abnormal pregnancies.
  • Emerging ultrasound methods screen between 11-13 weeks gestation.

Purpose of the Study:

  • To review published data on the feasibility of first-trimester screening for Down syndrome.
  • To evaluate early detection methods for chromosomal abnormalities.
  • To discuss the potential of novel prenatal screening strategies.

Main Methods:

  • Review of existing literature on first-trimester biochemical markers.
  • Analysis of studies utilizing early ultrasound markers (11-13 weeks).

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  • Discussion of combined first-trimester screening approaches.

    • Main Results:

    • Evidence suggests first-trimester biochemical markers can differentiate chromosomal abnormalities.
    • First-trimester ultrasound markers show promise for Down syndrome detection.
    • Combining biochemical and ultrasound data may enhance screening accuracy.

    Conclusions:

    • First-trimester screening for Down syndrome is a feasible alternative to second-trimester methods.
    • Early detection via maternal serum or ultrasound improves prenatal care options.
    • Further research can optimize first-trimester screening protocols.