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Table 1 A longitudinal view of single and multiple fetus clinical pregnancy rates, 2005–2016

From: Time associations between U.S. birth rates and add-Ons to IVF practice between 2005–2016

Study year 2005 2010 2015 2016 p-value
Clinical pregnancies (%)a 34.5 36.8 29.3 25.4  < 0.0001
Singleton (%) 20.5 23.1 20.4 19.8  < 0.0001
Multiples (%) 11.2 11.5 6.9 5.6  < 0.0001
No pregnancy (%) 65.4 62.4 70.2 72.2  < 0.0001
  1. This table demonstrates that multiple fetus clinical pregnancy rates after 2010 declined more than singleton pregnancies, suggesting a successful national U.S. effort to reduce multiple pregnancies and deliveries
  2. aWith reference point cycle start