Table 1.

Incidence of premature luteinization according to the protocol and definition

Study	Protocol	Definition	Incidence
Silverberg et al., 1991	GnRHa	P > 0.9 ng/mL	12.4%
Martinez et al., 2004	GnRHa	P > 0.9 ng/mL	52.3%
Edelstein et al. 1990; Silverberg et al. 1991, Fanchin et al. 1993; Givens et al. 1994; Harada et al. 1995; Ubaldi et al. 1995, 1996	GnRHa	P > .8–2 ng/mL	5–35%
Younis et al. 2001; Ou et al. 2007	GnRHa	P/E2 > 1	41%
Ubaldi et al. 1996	GnRH antagonist	P > 1.1 ng/mL	20%
Bosch et al. 2003	GnRH antagonist	P > 1.2 ng/mL	38.3%
Sims et al. 1994	Flare up	P > 1.0 ng/ml	85%