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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Obstet Gynecol. 2015 Jan;125(1):111–117. doi: 10.1097/AOG.0000000000000579

Fig. 2.

Fig. 2

Trends in monozygotic twinning for fresh, non-donor, single embryo transfer cycles by day of transfer, United States, 2003–2012. P=.80 for Cochrane-Armitage trend test.