 concentr non-esterifi fatti acid matern fetal plasma intact alloxan-diabet x-rai-irradi rat determin non-esterifi fatti acid plasma pregnant rat exist increas concentr depend pregnanc period 20th - 22nd dai pregnanc fetal plasma concentr non-esterifi fatti acid amount 40 - 50 cent matern valu alloxan diabet produc 2 dai prior test concentr matern plasma increas three- fivefold time rise absent fetal plasma increas averag valu whole-bodi x-rai exposur dose 400r dose output 40r min non-pregnant femal pregnant rat 17th dai pregnanc result chang concentr non-esterifi fatti acid irradi 