title: Morphological changes of the surface of the egg of Xenopus laevis in the course of development. I. Fertilization and early cleavage.
mesh_terms: D000818:Animals; D002455:Cell Division; D002462:Cell Membrane / Q000648:ultrastructure; D003594:Cytoplasmic Granules / Q000648:ultrastructure; D005260:Female; D005306:Fertilization; D005612:Freeze Drying; D005613:Freeze Etching; D008297:Male; D008855:Microscopy, Electron, Scanning; D010063:Ovum / Q000648:ultrastructure*; D014817:Vitelline Membrane / Q000648:ultrastructure; D014981:Xenopus / Q000033:anatomy & histology*