[Birth of a child with Down syndrome: parental choice or failure of screening policy?]

A Marx-Deseure1, S Carpentier2, D Thomas3

  • 1Pôle d'obstétrique, CHRU de Lille, hôpital Jeanne-de-Flandre, avenue Eugène-Avinée, 59037 Lille cedex, France.

Insights

Half of Down syndrome (DS) births result from parental choice, while screening failures account for 40%. Optimizing DS care requires better documentation of screening decisions and results.

Area of Science:

  • Perinatal health
  • Genetics
  • Public health

Background:

  • Births of children with Down syndrome (DS) can be influenced by parental decisions or screening inaccuracies.
  • Understanding the context of these births is crucial for improving prenatal care and support.

Purpose of the Study:

  • To investigate the circumstances surrounding births of children with Down syndrome (DS) within a French perinatal health network.
  • To analyze the roles of parental choice and screening effectiveness in DS births.

Main Methods:

  • A retrospective multicenter study was conducted.
  • Prospective registration of all live-born infants with DS between 2010 and 2013 was performed.

Main Results:

  • Sixty-three infants with DS were identified.
  • Complete, incomplete, and no screening occurred in 61%, 29%, and 10% of cases, respectively.
  • 50% of births were by parental choice, 40% due to screening failure, and 10% had unknown parental screening choices. False negatives often showed risks near 1/1000.

Conclusions:

  • Parental choice was a factor in 50% of DS births in this cohort.
  • Improved documentation of medical information, parental screening choices, and screening data is essential for optimizing follow-up care for DS.
Abstract

Related Concept Videos

Meiosis vs. Mitosis02:57

Meiosis vs. Mitosis

Cell division is necessary for growth and reproduction in organisms. Mitosis aids cell growth and development by dividing somatic cells. In contrast, meiosis causes the division of germ cells and plays an essential role in sexual reproduction. Due to their unique functional requirements, mitosis and meiosis differ from each other in multiple aspects.
Before the start of mitosis and meiosis I, the cell synthesizes DNA, resulting in two homologous copies of each chromosome. DNA synthesis is...
75.2K
Nondisjunction01:29

Nondisjunction

During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
84.0K
Nondisjunction01:21

Nondisjunction

Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate correctly and move to the opposite poles of the cells. This produces daughter cells with abnormal chromosome numbers.  Nondisjunction is common during anaphase I or anaphase II of meiosis.  Mutations in synaptonemal complex proteins that attach homologous chromosomes increase the chances of nondisjunction in anaphase I of meiosis I. In contrast, mutations in topoisomerases and condensins that hold...
5.9K
Nondisjunction01:29

Nondisjunction

10.3K
Meiosis I01:49

Meiosis I

Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by...
222.4K
Genomic Imprinting and Inheritance02:30

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
39.1K