the role of estradiol-17 beta ( e2 ) in migration of the porcine embryo was examined ( experiment 1 ) by observing the distribution of silastic ( polydimethyl siloxane , medical adhesive silicone type a , dow corning ) beads impregnated with cholesterol or e2 ( n=5 gilts per treatment ) after 5 days in utero ( day 12 of the estrous cycle , day 0=1st day of estrus ) .
C0012436
polydimethyl
C0037114
silicone