ABSTRACT
In my experience as a midwife, many women are familiar with the existence of Down’s syndrome or Trisomy 21, and that it is possible to screen for this condition, where a person has an additional chromosome. A test is routinely offered to pregnant women and is one of a series of different screening choices that they have to make. The nature of test results, however, involves women in the need to understand quite abstract notions of risk probability and this is something that most women seem to be unprepared for.
