[The breech partogram].
A partogram was made after analysis 383 spontaneous breech deliveries of primiparas and 343 of multiparas. The height of parturients was 160 cm or more, gestational age between 37 and 42 weeks and the newborn birthweight between 2500 and 3900 g. The newborns did not show any signs of fetal damage from the period of pregnancy or delivery. The duration of delivery was counted from the time of the cervical dilatation of 2 cm or more. A partogram was made after the statistical analysis of particular cervical dilatation phases; the duration of delivery in primiparas was up to 13 hours and 15 minutes and in multiparas up to 10 hours and 40 minutes. The second stage of delivery in primiparas was 1 hour and 20 minutes and in multiparas 40 minutes. The distribution of data concerning the duration of delivery demonstrated by the mean value and SD was symmetrical; the mean value of the duration of delivery with 99% of reliability was from 9 hours up to 10 hours and 54 minutes for primiparas and from 8 hours and 19 minutes up to 9 hours, and 18 minutes for multiparas. Breech delivery was accelerated in the earlier dilatation phase if compared to the later phase which was significantly slowed down.