Very early mammals.
D000818:Animals; D001826:Body Fluids; D002454:Cell Differentiation; D046508:Culture Techniques; D004622:Embryo, Mammalian; D004625:Embryo, Nonmammalian; D005260:Female; D007705:Kinins; D009698:Nucleoproteins / Q000096:biosynthesis; D010063:Ovum / Q000254:growth & development*; D014327:Trophoblasts
D007705:Kinins; D009698:Nucleoproteins