[Growth of the heart in Brazilian fetuses].

The growth of the heart was studied in 59 Brazilian fetuses by the allometric method (log y = k log x + log b). The mass of the heart (WH, log y) was correlationed with the parameters of the fetus (log x) as body mass (BM), crown-rump length and gestational age. The WH increases in an isometric way with the BM. However, the WH increases in an allometric way with the other parameters. The equations and graphics presented in this work were determined by the first time in the literature to the Brazilian fetuses.