| 19 weeks | 20 weeks | 21 weeks | 22 weeks | 23 weeks | 24 weeks |
---|---|---|---|---|---|---|
Nasal bone length | 0.96 | 0.93 | 0.95 | 0.96 | 0.92 | 0.90 |
Biparietal diameter | 0.94 | 0.99 | 0.98 | 0.99 | 0.99 | 0.97 |
Head circumference | 0.97 | 0.98 | 0.98 | 0.99 | 0.99 | 0.98 |
Abdominal circumference | 1.00 | 0.99 | 0.98 | 0.96 | 0.99 | 0.99 |
Femur length | 0.99 | 0.94 | 0.97 | 0.97 | 1.00 | 0.98 |
Tibia length | 0.98 | 0.97 | 0.97 | 0.98 | 0.99 | 0.97 |
Fibula length | 1.00 | 0.97 | 0.97 | 0.98 | 0.99 | 0.97 |
Humerus length | 0.95 | 0.99 | 0.99 | 0.98 | 0.97 | 0.98 |
Radius length | 0.99 | 0.96 | 0.98 | 0.98 | 0.98 | 0.95 |
Ulna length | 1.00 | 0.99 | 0.99 | 0.99 | 0.99 | 0.97 |
Estimated FBW | 0.97 | 0.96 | 0.96 | 0.94 | 0.97 | 0.99 |
UA PI | 1.60 | 1.06 | 1.04 | 1.06 | 1.06 | 1.06 |
UA RI | 1.22 | 1.05 | 1.03 | 1.03 | 1.01 | 1.03 |
MCA PI | 0.88 | 0.95 | 0.98 | 0.90 | 0.92 | 0.89 |
MCA RI | 0.94 | 1.00 | 0.99 | 0.96 | 0.98 | 0.96 |
MCA/UA PI ratio | 0.61 | 0.93 | 0.99 | 0.88 | 0.99 | 0.99 |
MCA/UA RI ratio | 0.77 | 0.98 | 1.00 | 0.95 | 0.96 | 0.98 |