The maternal mortality ratio (MMR) of Nigeria remains high. This retrospective study aims to suggest evidence-based strategies towards achieving the sustainable development goal target 3.1 at the Obafemi Awolowo University Teaching Hospital (OAUTHC), Nigeria by providing contemporary data on MMR between October 2012 and September 2015. There were 86 maternal deaths and 5243 live births over the triennium, with annual MMRs of 1744, 1622 and 1512/100,000 live births, respectively. Fifty-six (65.2%) were postpartum deaths, while 44 (51.2%) occurred within 12 hours of admission. Using the WHO ICD-10 system, the causes of mortality were pregnancy-related infections; 26 (30.2%), haemorrhage; 20 (23.3%), hypertension; 13 (15.2%) and pregnancies with abortive outcomes; 11 (12.7%). Financial constraints, misdiagnosis and delayed referrals constituted the predominant contributors. The MMR at OAUTHC, Nigeria in the last triennium of the MDG was ‘Extremely High’. Improved aseptic techniques, blood transfusion services, antimicrobial sensitivity evaluation, Universal Health Coverage, training-retraining of skilled birth-attendants and effective referral systems are advocated.