Table 3 Fetal cardiac structures observed and investigated by echocardiographic examination using 2D and color Doppler at various gestational ages

10th w

25 (12.9%)

< 0.001

171 (88.1%)

< 0.001

< 0.001

11th w

87 (44.8%)

< 0.001

179 (92.3%)

0.010

< 0.001

12th w

91 (46.9%)

< 0.001

180 (92.8%)

0.016

< 0.001

13th w

155 (79.9%)

< 0.001

182 (93.8%)

0.041

< 0.001

18th w

179 (92.3%)

–

190 (97.9%)

–

0.009

10th w

0 (0.0%)

< 0.001

0 (0.0%)

< 0.001

1.000

11th w

0 (0.0%)

< 0.001

6 (3.1%)

< 0.001

0.013

12th w

6 (3.1%)

< 0.001

18 (9.3%)

< 0.001

0.011

13th w

49 (25.3%)

0.306

89 (45.9%)

0.025

< 0.001

18th w

58 (29.9%)

–

111 (57.2%)

–

< 0.001

10th w

45 (23.2%)

< 0.001

128 (66.0%)

< 0.001

< 0.001

11th w

146 (75.3%)

< 0.001

179 (92.3%)

< 0.001

< 0.001

12th w

150 (77.3%)

< 0.001

185 (95.4%)

0.004

< 0.001

13th w

186 (95.9%)

0.004

191 (98.5%)

0.652

0.126

18th w

194 (100.0%)

–

194 (100.0%)

–

1.000

Crossing greater arteries

10th w

44 (22.7%)

< 0.001

103 (53.1%)

< 0.001

< 0.001

11th w

129 (66.5%)

< 0.001

173 (89.2%)

< 0.001

< 0.001

12th w

140 (72.2%)

< 0.001

178 (91.8%)

0.007

< 0.001

13th w

177 (91.2%)

< 0.001

187 (96.4%)

0.092

0.035

18th w

189 (97.4%)

–

192 (99.0%)

–

0.252

10th w

54 (27.8%)

< 0.001

120 (61.9%)

< 0.001

< 0.001

11th w

124 (63.9%)

< 0.001

160 (82.5%)

< 0.001

< 0.001

12th w

142 (73.2%)

< 0.001

182 (93.8%)

0.041

< 0.001

13th w

179 (92.3%)

< 0.001

187 (96.4%)

0.358

0.079

18th w

189 (97.4%)

–

190 (97.9%)

–

0.735

10th w

54 (27.8%)

< 0.001

120 (61.9%)

< 0.001

< 0.001

11th w

127 (65.5%)

< 0.001

167 (86.1%)

< 0.001

< 0.001

12th w

151 (77.8%)

< 0.001

185 (95.4%)

0.032

< 0.001

13th w

182 (93.8%)

< 0.001

186 (95.9%)

0.055

0.358

18th w

190 (97.9%)

–

192 (99.0%)

–

0.410