The body weight in grams can be estimated from the gestational age assuming normal development.
Wiggelsworth
|
menstrual age (end of week) |
mean weight in grams |
|---|---|
|
8.5 |
1 |
|
9 |
2 |
|
10 |
4 |
|
11 |
7 |
|
12 |
14 |
|
13 |
23 |
|
14 |
43 |
|
15 |
70 |
|
16 |
100 |
|
17 |
140 |
|
18 |
190 |
|
19 |
240 |
|
20 |
300 |
|
21 |
360 |
|
22 |
430 |
|
23 |
501 |
|
24 |
600 |
|
25 |
700 |
|
26 |
800 |
|
27 |
900 |
|
28 |
1001 |
|
29 |
1175 |
|
30 |
1350 |
|
31 |
1501 |
|
32 |
1675 |
|
33 |
1825 |
|
34 |
2001 |
|
35 |
2160 |
|
36 |
2340 |
|
37 |
2501 |
|
38 |
2775 |
|
39 |
3001 |
|
40 |
3250 |
week gestation =
= (1.1 * (10^(-15)) * ((birthweight in grams)^5))-(9.7 * (10^(-12)) * ((birthweight in grams)^4)) + (3.3 * (10^(-8)) * ((birthweight in grams)^3)) - (0.000052 * ((birthweight in grams)^2)) + (0.0442894 * (birthweight in grams)) + 10.806891
Sung and Singer: Liveborn
|
gestational age (weeks) |
body weight (grams), mean |
body weight (grams), low |
body weight (grams), high |
|---|---|---|---|
|
20 |
381 |
277 |
485 |
|
21 |
426 |
360 |
492 |
|
22 |
473 |
410 |
536 |
|
23 |
524 |
408 |
640 |
|
24 |
584 |
492 |
676 |
|
25 |
655 |
549 |
761 |
|
26 |
739 |
558 |
920 |
|
27 |
836 |
639 |
1033 |
|
28 |
949 |
759 |
1139 |
|
29 |
1077 |
628 |
1526 |
|
30 |
1219 |
788 |
1650 |
|
31 |
1375 |
1094 |
1656 |
|
32 |
1543 |
1024 |
2062 |
|
33 |
1720 |
1140 |
2300 |
|
34 |
1905 |
1280 |
2530 |
|
35 |
2093 |
1784 |
2402 |
|
36 |
2280 |
1665 |
2895 |
|
37 |
2462 |
1641 |
3283 |
|
38 |
2634 |
2100 |
3168 |
|
39 |
2789 |
2269 |
3309 |
|
40 |
2922 |
2472 |
3372 |
|
41 |
3025 |
2425 |
3625 |
|
42 |
3091 |
2474 |
3708 |
week gestation with mean birthweight =
= (1.7 * (10^(-9)) * ((birthweight in grams)^3))-(0.00001 * ((birthweight in grams)^2)) + (0.0238722 * (birthweight in grams)) + 12.762229
week gestation maximum for birthweight =
= (10^(-9)) * ((birthweight in grams)^3))-(0.000007 * ((birthweight in grams)^2)) + (0.0185798 * (birthweight in grams)) + 13.553081
week gestation minimum for birthweight =
= (3.7 * (10^(-9)) * ((birthweight in grams)^3))-(0.000019 * ((birthweight in grams)^2)) + (0.0355922 * (birthweight in grams)) + 10.996627
Sung and Singer: Stillborn
|
gestational age (weeks) |
body weight (grams), mean |
body weight (grams), low |
body weight (grams), high |
|---|---|---|---|
|
20 |
313 |
174 |
452 |
|
21 |
353 |
228 |
478 |
|
22 |
398 |
281 |
515 |
|
23 |
450 |
332 |
568 |
|
24 |
510 |
331 |
689 |
|
25 |
581 |
403 |
759 |
|
26 |
663 |
436 |
890 |
|
27 |
758 |
531 |
985 |
|
28 |
864 |
617 |
1111 |
|
29 |
984 |
473 |
1495 |
|
30 |
1115 |
786 |
1444 |
|
31 |
1259 |
671 |
1847 |
|
32 |
1413 |
790 |
2036 |
|
33 |
1578 |
1324 |
1832 |
|
34 |
1750 |
1256 |
2244 |
|
35 |
1930 |
1065 |
2795 |
|
36 |
2114 |
1498 |
2730 |
|
37 |
2300 |
1653 |
2947 |
|
38 |
2485 |
1906 |
3064 |
|
39 |
2667 |
2071 |
3263 |
|
40 |
2842 |
2360 |
3324 |
|
41 |
3006 |
2245 |
3767 |
|
42 |
3156 |
2478 |
3834 |
week gestation with mean birthweight =
= (1.2 * (10^(-9)) * ((birthweight in grams)^3))-(0.000008 * ((birthweight in grams)^2)) + (0.0206221 * (birthweight in grams)) + 14.939943
week gestation maximum for birthweight =
= (6.2 * (10^(-10)) * ((birthweight in grams)^3))-(0.000005 * ((birthweight in grams)^2)) + (0.0155894 * (birthweight in grams)) + 14.992423
week gestation minimum for birthweight =
= (3.7 * (10^(-9)) * ((birthweight in grams)^3))-(0.000018 * ((birthweight in grams)^2)) + (0.0326279 * (birthweight in grams)) + 14.756388
Specialty: Obstetrics & Gynecology, Pedatrics
ICD-10: ,
