Bronislawa and Mieczyslaw Konopacki - pioneers of the application of histochemistry to embryology in Poland.

In this paper, we review the life and work of Mieczyslaw Konopacki and his wife Bronislawa Konopacka. These Polish scientists introduced histochemical methods to embryological studies at the beginning of the XXth century; they were pioneers in this regard in Poland and among the first in the world to implement such methods in this way.

Oogenesis in pig ovaries during the prenatal period: ultrastructure and morphometry.

Oogenesis in fetal pig ovaries comprises the successive changes from the primordial germ cells to the dictyotene oocytes in primordial ovarian follicles. In this study the observations were carried out with an electron microscope and stereological analysis was performed. At the ultrastructural level there are no differences between the primordial germ cells and oogonia, but oogonia are connected with the intercellular bridges.