high doses of commercial unfractionated heparin ( 1 000 and 1 600 anti-xa units per kg of body-weight ) and high doses of a low molecular weight heparin fraction ( 1 000 ; 8 000 and 16 000 anti-xa units per kg of body weight ) were injected to animals at the end of gestation ( term : 30 days ) .
C0019134
unfractionated heparin
C0019139
anti-xa