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. 2019 Jan 29;9(1):e027941. doi: 10.1136/bmjopen-2018-027941

Figure 1.

Figure 1

Effects of interpregnancy interval on preterm birth (PTB) and low birth weight (LBW), with and without matching pregnancies to the same women, Western Australia, 1980–2010. Figures produced from statistics reported in Ball et al. 201426.