2 0 0 http://purl.obolibrary.org/obo/FBdv_00005288 fertilized egg stage 'fertilized egg stage' SubClassOf http://purl.obolibrary.org/obo/FBdv_00018001 some 'embryonic stage' http://purl.obolibrary.org/obo/FBdv_00005289 embryonic stage 'embryonic stage' SubClassOf http://purl.obolibrary.org/obo/RO_0002087 some 'fertilized egg stage' 'embryonic stage' SubClassOf http://purl.obolibrary.org/obo/RO_0002087 some 'unfertilized egg stage'