AMH and Pregnancy Outcome in IVF

Anti-Mu¨llerian hormone (AMH) is an established marker of ovarian reserve (La Marca et al., 2010; Nelson et al., 2009) and predicts both high and low responses in ovarian stimulation cycles (Eldar-Geva et al., 2005; Nardo et al., 2009; Nelson et al., 2007). Presently, AMH helps clinicians counsel patients prior to IVF treatment (La Marca et al., 2011), despite the fact that it fails to predict who will become pregnant (Lamazou et al., 2011; Riggs et al., 2011). It has been demonstrated that poor responders can achieve both pregnancy and live birth (Weghofer et al., 2011). There are few studies regarding extremely low AMH concentrations and live births (Fraisse et al., 2008; Tocci et al., 2009; Weghofer et al., 2011) and they present either a small number of patients or limited data describing the groups of investigated patients. Another factor affecting pregnancy rates is endometriosis, a chronic gynaecological disease characterized by the presence of functional endometrial tissue outside the uterine cavity (Koninckx et al., 1991). Many studies have reported that pregnancy rates are lower in women with endometriosis than in controls (Gupta et al., 2008; Koninckx et al., 1991 Pellicer et al., 2000). Lower AMH serum concentrations are associated with endometriosis severity (Shebl et al., 2006). The primary objective of the present study was to assess the clinical pregnancy rates in women with extremely low AMH concentrations with respect to age.