Methods of obtaining and mode of action of stage ontogenins.
D000818:Animals; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D009705:Nucleosides / Q000494:pharmacology*; D009711:Nucleotides / Q000494:pharmacology*
D009705:Nucleosides; D009711:Nucleotides
EMBRYO; NUCLEOSIDES AND NUCLEOTIDES/pharmacology