Table 1: Demographic variables, pregnancy information, and knowledge.

Variable (N = numbers of respondents) Percentage

Nationality mother ( )
 Dutch 197 93.8
 Non-Dutch13 6.2
Religious ( )
 Yes90 42.9
 No120 57.1
Marital status ( )
 Married99 47.1
 Cohabitant100 47.7
 Single3 1.4
 Living apart together 8 3.8
Education mother ( )
 Low secondary education 23 11.0
 Middle secondary education 12 5.7
 High secondary education 5 2.4
 Middle professional education 62 29.7
 High professional education 68 32.5
 University 39 18.7
Education partner ( )
 Primary school 3 1.5
 Low secondary education 23 11.4
 Middle secondary education 9 4.5
 High secondary education 7 3.5
 Low professional education 1 0.5
 Middle professional education 72 35.6
 High professional education 51 25.2
 University 36 17.8
Reproduction method ( )
 Spontaneous16389.1
 Assisted reproduction 20 10.9
Will have a 20-week scan ( )
 No 2 1.0
 Yes 203 96.6
 Uncertain 5 2.4
Thinks the 20-week scan is reliable in fetal
sex determination ( )
 No 8 3.8
 Yes737.3
 Yes, very reliable123 58.9
Do you know sex chromosomal
aberrations? ( )
 Yes 12 7.7
 No 143 92.3