Table 1.
Multiple of median (MoM) of AFP as detected in 3,119 cases, sorted according to weeks of gestation (w.o.g.).
| w.o.g. | data from Habib (1977) median of AFP (μg/ml) | singletons | dizygote twins | ||||
|---|---|---|---|---|---|---|---|
| number of cases | median of AFP (μg/ml) | number of cases | median of AFP (μg/ml) | ||||
| 1st twin | 2nd twin | average | |||||
| 12 | 38 | 3 | (28.40) | - | - | - | - |
| 13 | 36 | 17 | 16.76 | - | - | - | - |
| 14 | 34 | 67 | 16.78 | 3 | (18.21) | (13.02) | (15.62) |
| 15 | 31 | 515 | 14.90 | 8 | 16.99 | 12.60 | 14.80 |
| 16 | 27 | 676 | 13.38 | 15 | 16.88 | 13.06 | 14.97 |
| 17 | 24 | 484 | 11.27 | 11 | 14.82 | 11.08 | 12.95 |
| 18 | 22 | 314 | 9.17 | 5 | (9.36) | (8.86) | (9.11) |
| 19 | 18 | 275 | 7.41 | 4 | (8.51) | (6.66) | (7.59) |
| 20 | 15 | 376 | 5.42 | 6 | (7.01) | (5.54) | (6.28) |
| 21 | 12 | 252 | 4.61 | 2 | (5.27) | (4.37) | (4.82) |
| 22 | 10 | 65 | 3.84 | 1 | (3.19) | (2.71) | (2.95) |
| 23 | 7 | 29 | 3.00 | 1 | (4.43) | (4.43) | (4.43) |
| 24 | 6 | 10 | 2.70 | - | - | - | - |
| 25 | 4 | 4 | (3.29) | - | - | - | - |
| 26 | 3.5 | 8 | 2.01 | - | - | - | - |
| 27 | 3 | 3 | (1.90) | - | - | - | - |
| 28 | 2.5 | 5 | (1.57) | - | - | - | - |
| 29 | 2 | - | - | - | - | - | - |
| 30 | 1.5 | 3 | (1.00) | - | - | - | - |
| 31 | 1 | 5 | (1.16) | - | - | - | - |
| 32 | 0.5 | 3 | (0.40) | - | - | - | - |
| 33 | 0.25 | 3 | (0.80) | - | - | - | - |
| 34 | 0 | - | - | - | - | - | - |
| 36 | 0 | 1 | (0.40) | - | - | - | - |