we conclude that , in the sheep heart , 1 ) lv and rv morphometric differences exist during fetal and postnatal development , 2 ) fetal lv and rv myocardial morphometry is consistent with an rv dominance in utero , 3 ) rapid growth of lv and rv myocytes occurs in the perinatal period , and 4 ) the relative size of lv and rv myocytes does not reflect a postnatal lv dominance until between 1 and 4 wk after birth .
C0018787
heart
C0225883
rv