[Serum plasminogen levels and timing of ovulation]

During diagnosis and treatment of female sterility, plasminogen and fibrinogen degraduation products were measured from patient's vein blood in the cycle of menstruation on the days round menstruation. On the days round ovulation and also before beginning of menstrual bleeding an elevated plasminogen level by unchanged fibrin(ogen) degraduation products was found. Therefore the plasminogen modulation as a causal factor for the rupture of follicles is discussed.