Causes | Second trimester (n = 192) | Third trimester (n = 47) | Total, n (%) | ||||
---|---|---|---|---|---|---|---|
14–19+ 6 (n = 58) | 20–23+ 6 (n = 62) | 24–27+ 6 (n = 72) | 28–31+ 6 (n = 26) | 32–36+ 6 (n = 19) | ≥ 37 (n = 2) | ||
Fetal factors | 14 (24.14) | 27 (43.55) | 44 (61.11) | 12 (46.15) | 7 (36.84) | 0 (0.00) | 104 (43.51) |
Maternal factors | 13 (22.41) | 18 (29.03) | 12 (16.67) | 9 (34.62) | 6 (31.58) | 1 (50.00) | 59 (24.69) |
Umbilical cord factors | 1 (1.72) | 6 (9.68) | 7 (9.72) | 3 (11.54) | 4 (21.05) | 1 (50.00) | 22 (9.21) |
Placental factors | 5 (8.62) | 6 (9.68) | 5 (6.94) | 2 (7.69) | 2 (10.53) | 0 (0.00) | 20 (8.37) |
Unknown reasons | 25 (43.10) | 5 (8.06) | 4 (5.56) | 0 (0.00) | 0 (0.00) | 0 (0.00) | 34 (14.23) |