XIV, 3 
Acosta-Sison and Calderon: Pelvimetry 
265 
Table V . — The relationship of the index of the posterior plane of the pelvic 
outlet to the length of the second stage and birth weight of the baby. 
Index of posterior plane of pelvic outlet 
in multiparfe. 
Normal 
and spon- 
taneously 
delivered. 
Cases, 
651. 
Average 
length of 
second 
stage of 
labor. 
Average 
birth 
weight 
of baby. 
Average 
grams of 
birth 
weightof 
baby per 
minute of 
second 
stage. 
H. m. 
0. 
31 to 40. 9 
124 
0 57.76 
2 , 879 
48.1 
41 to 50. 9 
390 
1 00 
2, 996 
49. 98 
51 to 60. 9 
126 
0 44 
3,035 
69.0 
62 to 74.9. - 
11 
0 47 
3,041 
65.0 
On examining Table V one notices the close relationship be- 
tween the weight of the baby, the index of the posterior plane, 
and the length of the second stage of labor. 
Table VI . — Cases with prolonged second stage of labor; iS cases; not 
included in Table V. Multiparas. 
Index of the poste- 
rior plane of pelvic 
outlet. 
Cases 
Aver- 
age 
length 
of 
second 
stage 
of 
labor. 
Aver- 
age 
birth 
weight. 
Aver- 
age 
grams 
of 
weight 
per 
minute 
of 
second 
stage. 
Complications. 
Operations. 
H. VI. 
Prolapse of hand 
with vertex, 1 
Placenta previa, 1 
IMid forceps, 1. 
31 to 40.9 
10 
3 54 
3,133 
13.4 
L. O. P„ 1 
R. O. T„ 1 
L. O. T„ 1 
Prolonged labor, 5 
,R. O. P„ 8 \ 
L. O. P„ 2 
Placenta previa, 1 
R. O. T., 1 
Transverse position, 
1 
L. M. A., 3.... 
Prolapse arm with 
vertex, 1 
Uterine inertia, 1 
Dry labor, 1 
Prolonged labor, 3.../ 
R. O. P„ 4 1 
<Low forceps, 7. 
IPodalic version, 1. 
(Podalic version, 1. 
41 to 50. 9 
25 
2 44 
3,089 
18.8 
jMid forceps, 5. 
ILow forceps, 3. 
51 to 67. 9 
8 
2 10 
a 3.448 
26.5 
1 Placenta previa, 1 1 
Big baby, 3 | 
Podalic version, 5. 
One baby weighed 6,320 grams. 
