Fig. 3

Cycle outcomes over three time periods (1999–2000; 2004–2006; 2014–2014) for patients with no prior ART (a) and with prior ART (b). Solid black bar = BNH from 1999 to 2000, solid gray bar = WNH from 1999 to 2000, dark red bar = BNH from 2004 to 2006, light red bar = WNH from 2004 to 2006, dark blue bar = BNH from 2014 to 2016, light blue bar = WNH from 2014 to 2016. * p < 0.01, **p < 0.001, results reported with standard error bars and were not significant unless otherwise specified