Table 2.

Primary pregnancy outcomes in the 5 included randomized controlled trials reported on a per patient basis

Study	Initiation of P in relation to OR (Day 0)	Patients (n)	Implantation rate	P value	Biochemical pregnancy	P value	Clinical pregnancy	P value	Live Birth	P value
Sohn et al. 1999	12 hrs before	158 (cycles)	NR	NR	NR	NR	12.9%	0.011	NR	NR
	Day 0	156 (cycles)	NR		NR		24.6%		NR
Williams et al. 2001	Day 3	59	27%	NS	NR	NR	61.0%	0.05	NR	NR
	Day 6	67	20%		NR		44.8%		NR
Fanchin et al. 2001	Day 0	43	18%	NR	NR	NR	42.0%	0.26	NR	NR
	Day 2	41	12%		NR		29.0%		NR
Baruffi et al. 2003	Day 0	51	12.6%	0.98	NR	NR	27.4%	1.00	NR	NR
	Day 2	52	13.4%		NR		28.8%		NR
Mochtar et al. 2006	36 hrs before	130	NR	NR	25.4%	NR	23.1%	0.56	20.0%	NR
	Day 0	128	NR		30.5%		28.1%		21.1%
	Day 3	127	NR		32.3%		29.1%		20.5%