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. Author manuscript; available in PMC: 2021 Dec 1.
Published in final edited form as: Early Hum Dev. 2020 Oct 3;151:105203. doi: 10.1016/j.earlhumdev.2020.105203

Figure 2.

Figure 2.

Expected (from autocorrelation and month of year) less observed risk ratios for 96 monthly conception cohorts starting with January 2009 and ending December 2016. Alwan and Roberts sequence marked with X.