“…After screening the full texts, a total of 318 papers were excluded as they did not meet the eligibility criteria. Finally, 34 papers were included in this systematic review (Aghssa et al, 2008(Aghssa et al, , 2012Alviggi et al, 2007;Bergh et al, 2012;Dickey et al, 2002Dickey et al, , 2003European and Israeli Study Group on Highly Purified Menotropin versus Recombinant Follicle-Stimulating Hormone, 2002;European and Middle East Orgalutran Study Group, 2001;Germond et al, 2002;Gocial et al, 2000;Greco et al, 2005;Hovatta et al, 2009;Kang et al, 2011;Kettel et al, 2004;Keye et al, 2005;Lan et al, 2008;Lavery et al, 2008;Lockwood et al, 2014;Ng et al, 2003Ng et al, , 2007Nichols et al, 2001;Out et al, 1997;Pang et al, 2003;Porter et al, 2008;Pouly et al, 1996;Schoolcraft et al, 2000;Simunic et al, 2007;Somkuti et al, 2006;Tomic et al, 2011Tomic et al, , 2015Utsunomiya et al, 2012;Verhoeff et al, 1997;Welcker et al, 2010;Zorn et al, 2001). One paper actually reported on two separate studies (Porter et al, 2008).…”