2007, Sisir K Chattopadhyay, Chhaya Chattopadhyay, & Bijoy Sree Sengupta, "Polycystic Ovarian Syndrome", in Gynaecology for Postgraduates and Practitioners (eds. Bijoy Sree Sengupta, Sisir K Chattopadhyay, & Thankam R. Varma), Elsevier (2007), , page 118:An analysis of 101,073 women in the Nurses' Health Study II reported that over an 8-year period, the conversion rate to type 2 diabetes amongst oligomenorrhoeic women was approximately twice than that for eumenorrhoeic women, regardless of whether the oligomenorrhoeic women are obese or lean, indicating that oligomenorrhoea was an independent predicator of type 2 diabetes.
2010, Sasha Abraham, Kunal Kulkarni, Rashmi Madhu, & Drew Provan, The Hands-on Guide to Data Interpretation, Wiley-Blackwell (2010), , unnumbered page:Therefore amenorroheic or severely oligomenorrhoeic women with PCOS should have induced withdrawal bleeds at regular intervals to reduce the risk of developing endometrial hyperplasia.
2011, Danielle Mazza, Women's Health in General Practice, Elsevier (2011), , unnumbered page:the use of the combined oral contraceptive pill has hidden the fact that many women are oligomenorrhoeic or amenorrhoeic
