“…In the first part of the experiment, 6, 8, and 6 lambs from ewes which had re-ceived 0 (control), 2.3 (low), or 4.5 (high) mg lead/kg-day, respectively, throughout gestation were tested in the maze (14). Mean blood residues in the ewes during pregnancy were 5, 18, and 34 uag/100 ml for the control, low, and high groups, respectively.…”