[Population studies of Gm (a)].

The author carried out her own studies of Gm (a) on 2816 persons, in whom a factor frequency was found in 33.3% and gene frequency--0.1833. She summarized all published in Bulgaria up to now population studies in respect to Gm (a) (1838), in whom the mean factor frequency was 38.67% and gene frequency--0.2129. The theoretical probability for excluding fatherhood only by Gm (a) in our country was 10.23%.