“…Growing evidence supports a relationship between PD and female infertility related conditions, namely polycystic ovary syndrome (PCOS) [ 22 , 23 , 25 , 26 , 27 , 28 , 47 , 48 , 49 , 50 , 51 ], endometriosis [ 29 , 30 ] and obesity [ 52 , 53 , 54 , 55 , 56 ]. Furthermore, recent studies have substantiated the relationship between maternal PD as a potential risk factor of adverse pregnancy outcomes [ 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ]. Periodontal therapy may prevent or reduce perinatal and maternal morbidity and mortality, especially in mothers at high risk [ 65 , 66 ], though a Cochrane review reported unclear evidence that periodontal treatment during pregnancy has an impact on preterm birth [ 67 ].…”