[Spontaneous and induced fetal movement activity in the 2d trimester of pregnancy].

During routine screening in the first half of pregnancy the authors evaluated in 3446 foetuses the incidence of spontaneous movements and movements after their attempted induction by movement of the uterus, when no spontaneous movements were recorded during examination. The examinations were made by means of a rotation probe 3.5 MHz of a Sonoline 2 apparatus (Siemens) always between 7.

Frequency of foetal growth deviations diagnosed by ultrasonic measurement and analysis of their causes.

In a population sample, whose congruity with the country-wide population was verified, the birthweight, menstrual age and gestational age (assessed by repeated ultrasonic foetometry in the course of pregnancy) were mutually correlated. A group of 80% of newborns out of the total population sample, in whom no disturbance of foetal growth rate was found throughout the course pregnancy, served as the basis for preparation of the standard of normal foetal growth. In the interval from the 36th to the 42nd week of pregnancy a highly significant linear relationship between gestational age and birthweight was found, without terminal flattening of the "normal foetal growth curve".

[Relation between the biparietal diameter, thoracic transverse diameter, birth weight and the sex of the infant].

We have found in ultrasonic measurements, that the birth weight from newborn males and females is equal, if the biparietal diameter of the fetuses had been the same. Opposite we found by measuring the equal thoracic transversal diameter, that the birthweight of the males was about 200 bis 300 g higher than that of the females.

The effect of fructose infusions in the course of labor upon parturient and fetus.

Fructose infusions were administered to parturients with healthy term fetuses at a speed of 1 g/min for 106 on the average. The results confirm that fructose has the expected properties. The blood glucose and FFA levels show that a substantial part of the infused fructose is indeed stored and that only a small portion is used to cover immediate energy needs.

In vitro interaction of prostaglandin F2alpha and oxytocin in placental vessels.

The interaction of prostaglandin F2alpha and synthetic oxytocin on placental vessels was studied in vitro. Resistance was measured near the placental margin after spontaneous term delivery. In seven experiments reactions to norepinephrine and oxytocin were PGF2alpha.