title: Anuran fertilization: a morphological reinvestigation of some early events.
mesh_terms: D000818:Animals; D001001:Anura / Q000502:physiology*; D005260:Female; D005306:Fertilization; D008297:Male; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D010063:Ovum / Q000648:ultrastructure; D010999:Pleurodeles; D011893:Rana esculenta; D011894:Rana pipiens; D011896:Rana temporaria; D013084:Sperm-Ovum Interactions; D013094:Spermatozoa / Q000648:ultrastructure