[Human follicular oocytes (cytologic and physiologic characteristics)].

The morphology and the rate of degenerative changes were studied in the oocytes recovered from the antral follicles of the operated women. The rate of meiosis resumption, chromosome aberrations and electrophysiological properties were studied in the cultivated oocytes. These indices were compared in women of different age and pathology.

[Change in the electrophysiological parameters of rat oocytes maturing in vivo].

The membrane potential (MP) and input membrane resistance (R) were measured in the immature (1) and mature ovulated (2) rat eggs. The population 1 is homogeneous enough: in 78.3% of all oocytes MP equaled --18 +/- 0.

[Cytophotometric determination of DNA concentration in the nuclei of the human placental trophoblast in late toxemias of pregnancy].

The distribution of trophoblast nuclei of the human placenta by their ploidy was studied in normal pregnancy and in late pregnancy toxemias by the monowave emthod of cytophotometry in visible light. In the plasmodiotrophoblast a pronounced increase in the amount of nuclei in the S-phase (up to 40%) was noted in late toxemias which suggests a considerable activation of the DNA synthesis. The placenta cytotrophoblast in late toxemias is substantially different from that in normality.