FHMP , FHMPGold, gastrulation, neurulation, neural tube, embryo, fertillisation, zygote, fhmpembryology embryology, specification, determination, differentiation, ZP3, SHH, morphogen gradient, capacitation, cleavage, implantation, gastrulation, neurulation, neural tube, notocord, ectoderm, mesoderm, endoderm, bilaminar disc, trilaminar disc, fertilisation