Fig. 3From: Can successful pregnancy be achieved and predicted from patients with identified ZP mutations? A literature reviewDifferent phenotypes of patients with ZP mutations. Different mutations of ZP can cause different clinical phenotypes, including empty follicle syndrome, ZP-thin oocytes, ZP-free oocytes, degenerated oocytes, and immature oocytes. COC, cumulus-oocyte complexes; EFS, empty follicle syndromeBack to article page