#	Query	Results
S21	S5 AND S8 AND S20	43
S20	S9 OR S10 OR S11 OR S12 OR S13 OR S14 OR S15 OR S16 OR S17 OR S18 OR S19	1,306,088
S19	TX allocat* random*	9,893
S18	(MH "Quantitative Studies")	21,889
S17	(MH "Placebos")	11,148
S16	TX placebo*	55,507
S15	TX random* allocat*	9,893
S14	(MH "Random Assignment")	53,584
S13	TX randomi* control* trial*	164,085
S12	TX ( (singl* n1 blind*) or (singl* n1 mask*) ) or TX ( (doubl* n1 blind*) or (doubl* n1 mask*) ) or TX ( (tripl* n1 blind*) or (tripl* n1 mask*) ) or TX ( (trebl* n1 blind*) or (trebl* n1 mask*) )	1,004,440
S11	TX clinic* n1 trial*	239,105
S10	PT Clinical trial	86,754
S9	(MH "Clinical Trials+")	254,558
S8	S6 OR S7	32,112
S7	TX temperature*	28,861
S6	(MM "Temperature+")	6,846
S5	S1 OR S2 OR S3 OR S4	27,101
S4	TX embryo* or TX blastocyst*	21,984
S3	TX IVF or TX ICSI	4,562
S2	(MM "Fertilization in Vitro")	3,177
S1	TX vitro fertilisation or TX vitro fertilization	6,442