TABLE 111-1. Mean Gestational Sac Diameter and Crown-Rump Length and Corresponding Menstrual Age 32 4.6 3 34 4.9 5 36 5.1 6 38 5.4 8 10 0.2 42 6.0 12 OJ5 44 6J 14 0.5 46 6.6 16 0.7 48 6.9 18 0.9 50 7.1 1r.0 52 7.4 22 1.2 54 7.7 24 1.4 56 8.0 58 8.3 27 1.8 60 8.6 29 2.0 8.9 31 2.2 64 9.1 33 2.4 66 9.4 2.6 2.9 70 10.0 3.1 74 10.6 3.7 76 10.9 4.0 78 11.1 47 4.2 80 11.4 49 4.6 12.0 53 5.4
Data from Nyberg, 1992; Hadlock, 1992; 1975; Daya, 1991r.
TABLE 111-2. Mean Gestational Age Percentiles Corresponding to Crown-Rump Length (CRL) Measurements
TABLE 111-3. Fetal Weight Percentiles According to Gestational Age
Adapted with permission from Hadlock, 1991n.
TABLE 111-4. Smoothed Birth Weight Percentiles for Twins with Dichorionic Placentation
GA = gestational age.
Reproduced with permission from Ananth, 1998.
TABLE 111-5. Smoothed Birth Weight Percentiles for Twins with Monochorionic Placentation
Reproduced with permission from Ananth, 1998.
TABLE 111-6. Fetal Thoracic Circumference Measurements (cm) According to Gestational Age