Aim: To assess whether exogenous estradiol has any effect on migration of primordial germ cells (PGCs) in the chick. Met......

选用１２日龄蛋鸡雏９０只，随机分成３组，Ⅰ组每羽注鸡血清制剂１ｍＬ；Ⅱ组每羽肌注“双抗”１ｍＬ；Ⅲ组每羽肌注生理盐水１ｍＬ。对各组的生活率，生产性能及免疫后的......