Figure 2. The correlation between LogGDP and pregnancy/delivery rates in ART cycles from 2012 ICMART data, respectively. a: pregnancy rate in IVF cycles (IVF-PR). b: delivery rate in IVF cycles (IVF-DR); c: pregnancy rate in ICSI cycles (ICSI-PR). d: delivery rate in ICSI cycles (ICSI-DR); e: pregnancy rate in FET cycles (FET-PR). f: delivery rate in FET cycles (FET-DR). CC: correlation coefficient.