We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleCracking the egg: increased complexity in the zona pellucida.AuthorsConner SJ; Lefièvre L; Hughes DC; Barratt CLPublicationHuman reproduction (Oxford, England), 2005, Vol 20, Issue 5, p1148ISSN0268-1161Publication typearticleDOI10.1093/humrep/deh835