Korzhova V V, Lisitsina N T, Smirnova E I, Kiseleva L A
Biull Eksp Biol Med. 1976 Jul;82(7):864-6.
Penicillin injected to rats in high doses at various periods of pregnancy produced no negative effect on the devloping fetus and neonate. At the same time bicillin-3 produced resorption of the embryonic cells and had a negative effect on the heart development.