The intervention was a 16-minute educational video created by the study investigators which provided information about Down syndrome, diagnostic tests and screening tests. The screening tests covered in the video included the triple test, the combined first trimester screen and non-invasive prenatal screening. Information about how and when each of the tests were performed, their detection rates and possible results and their interpretations were covered in the video. The video was viewed by several healthcare providers and experts in the field of prenatal screening before the commencement of this study to ensure that the content was appropriate and adequate. The intervention was viewed by subjects on a portable tablet in a quiet room in the antenatal clinic. Subjects were then invited to ask their doctor any questions that they may have had about the video during the clinic consult which followed.

Women in the control group were counselled by the referring doctor regarding the aneuploidy screening options of FTS or NIPS, and provided information about the procedures involved for each test, their detection rates, cost, and possible results of testing. The use of a written information leaflet was available to doctors as an adjunct to providing this information.

See arm description

Outcome will be measured using the modified multidimensional measure of informed choice (MMIC).

Outcome will be measured using 6 questions to measure deliberation on a five-point Likert scale

Outcome will be measured using a 19-item validated true/false knowledge questionnaire.