Tjeerd Tymstra

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OBJECTIVE To determine the opinions of women about the new developments in the field of noninvasive prenatal diagnosis (NIPD). METHOD Prospective study using questionnaires in two groups of women: women visiting the University Medical Centre Groningen and the Martini Hospital Groningen for the routine fetal anomaly ultrasound scan at 20 weeks' gestation(More)
  • T Tymstra
  • International journal of technology assessment in…
  • 1991
More and more medical technologies are becoming available for the early detection of congenital abnormalities, such as amniocentesis, chorionic villus sampling, and ultrasound scanning. Recent research has shown that maternal serum can provide a wealth of information on the unborn fetus and that the testing method lends itself to mass screening. Although(More)
  • T Tymstra
  • International journal of technology assessment in…
  • 1989
Medical-technical possibilities are often experienced as being strongly compelling. This imperative character of medical technology not only applies to the medical profession, but also to patients who frequently find it very difficult to refuse medical examinations or treatments. This article discusses the technological imperative with regard to patients.(More)
OBJECTIVE To compare the experiences of women who received a screen-positive test result for Down syndrome after nuchal translucency screening or after biochemical screening in the first trimester of pregnancy in the Netherlands. METHOD Semi-quantitative questionnaires were sent to 40 women with a screen-positive test result for Down syndrome in the first(More)
We sent written questionnaires to 93 Dutch women [73 current and potential clients of the Rotterdam in vitro fertilization (IVF) program and 20 fertile nonusers] to determine the motivation for participation in IVF, patients' reactions to treatment, and views of concerned laypersons on current ethical/social issues. Seventy-eight (84%) completed the(More)
Although the term 'genetic screening' has been used for decades, this paper discusses how, in its most precise meaning, genetic screening has not yet been widely introduced. 'Prenatal screening' is often confused with 'genetic screening'. As we show, these terms have different meanings, and we examine definitions of the relevant concepts in order to(More)
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