see also Blastocyst; Embryo- 

 maternal relationships; 

 Pregnancy 



general, miscell., unspecified 

 Jiricka 

 New 



Ockleford 

 Vacek 



biochem. & biophys. studies 

 Bielanska 

 Czarnowska 

 Gennser 

 Kaufmann 



POLARITY 



see Gradient(s); Symmetry 



POLE CELLS 



see Germ cells (primordial) 



POLLEN (& PoUen tube) 

 see Embryology (plant: exper- 

 imental); FertUisation 



PREGNANCY 



see also Embryo-maternal 

 relationships; Placenta(tion) 



181 



