1 Values are frequencies (%).
2 The first routine ultrasound examination,
1st trimester; gestational weeks 20-22,
2nd trimester; gestational weeks 33-35,
3rd trimester.
3 Pregnancy complications include cardiovascular
disease, blood system disease, respiratory system disease, nervous
system disease.
Table 2 Correlation coefficient matrix of social support, stress and
depression (n = 1056)