| Number of pregnant women | Maternal age | FHR | EFW | Placental grade | Placental thickness (cm) |
---|---|---|---|---|---|---|
13 W | 10 | 18–40 | 154–177 | 42–64 | I | 1.0–2.0 |
14 W | 10 | 25–37 | 153–164 | 64–85 | I–II | 1.5–3.0 |
15 W | 10 | 23–40 | 143–165 | 96–127 | I–II | 1.9–2.9 |
16 W | 10 | 24–42 | 143–162 | 121–174 | I–II | 1.7–3.1 |
17 W | 10 | 18–35 | 144–191 | 135–193 | I–II | 2.0–3.0 |
18 W | 10 | 22–31 | 146–159 | 225–235 | I–II | 2.5–3.1 |
19 W | 10 | 24–34 | 148–158 | 263–408 | I–II | 2.0–3.5 |
20 W | 11 | 16–35 | 123–157 | 294–362 | I–II | 1.7–3.1 |
21 W | 10 | 25–38 | 146–154 | 412–556 | II | 2.2–3.1 |
22 W | 10 | 24–28 | 152–161 | 453–549 | II–III | 2.5–3.4 |
23 W | 10 | 23–34 | 139–161 | 533–617 | II | 2.2–4.0 |
24 W | 10 | 20–33 | 149–158 | 631–741 | II | 2.0–4.0 |
25 W | 9 | 25–29 | 157–164 | 765–810 | II | 3.2–3.5 |
26 W | 10 | 20–32 | 141–153 | 563–1069 | II–III | 2.5–3.7 |
27 W | 10 | 24–37 | 146–160 | 631–1284 | II | 2.4–4.0 |
28 W | 10 | 22–34 | 138–155 | 1051–1509 | II–III | 2.2–4.4 |
29 W | 10 | 26–33 | 137–165 | 1307–1449 | II–III | 3.0–4.2 |
30 W | 10 | 24–41 | 142–157 | 1538–1604 | II–III | 2.9–3.9 |
31 W | 10 | 27–30 | 136–161 | 1617–1828 | II–III | 3.0–3.9 |
32 W | 9 | 20–33 | 141–161 | 1551–2464 | II–III | 3.0–4.5 |
33 W | 10 | 23–35 | 149–151 | 2052–2201 | III | 2.6–3.5 |
34 W | 15 | 20–27 | 138–160 | 2052–2706 | II–III | 2.8–5.2 |
35 W | 22 | 23–30 | 120–140 | 2298–2810 | II–III | 3.1–4.2 |
36 W | 32 | 17–32 | 123–144 | 2341–2700 | III | 2.9–3.9 |
37 W | 49 | 20–35 | 120–150 | 2582–3203 | III | 2.8–4.0 |
38 W | 49 | 19–36 | 124–147 | 2893–3320 | III | 3.0–4.1 |
39 W | 30 | 22–34 | 125–148 | 2730–3429 | III | 3.1–4.3 |
40 W | 22 | 23–37 | 130–149 | 2930–3481 | III | 3.3–4.5 |