The Lancet · 2012 · 783 citations · 61 references
61
Maternal deaths averted by contraceptive use: an analysis of 172 countries
Saifuddin Ahmed, Qingfeng Li, Li Liu et al. · The Lancet · 2012 · 918 citations
Birth Spacing and Risk of Adverse Perinatal Outcomes
&NA; · Survey of Anesthesiology · 2007 · 675 citations