[Ultrasonographic monitoring of ovarian hyperstimulation by exogenous gonadotropins and subsequent twin-pregnancies (author's transl)].

In contrast to estrogen-monitoring the ultrasonographic monitoring of the ovaries renders possible the estimation of individual follicular growth stimulated by gonadotropins. In two patients suffering from anovulation and additional factors inhibiting fertility, ultrasonographic monitoring was used in order to induce a pregnancy after moderate hyperstimulation nevertheless.