#	Query	Results
S32	S19 AND S31	310
S31	S20 OR S21 OR S22 OR S23 OR S24 OR S25 OR S26 OR S27 OR S28 OR S29 OR S30	1,355,174
S30	TX allocat* random*	11,049
S29	(MH "Quantitative Studies")	23,579
S28	(MH "Placebos")	11,474
S27	TX placebo*	59,611
S26	TX random* allocat*	11,049
S25	(MH "Random Assignment")	55,964
S24	TX randomi* control* trial*	177,249
S23	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*) )	1,033,075
S22	TX clinic* n1 trial*	252,733
S21	PT Clinical trial	86,291
S20	(MH "Clinical Trials+")	268,471
S19	S17 AND S18	1867
S18	S8 OR S9 OR S10 OR S11 OR S12 OR S13 OR S14 OR S15 OR S16	29,812
S17	S1 OR S2 OR S3 OR S4 OR S5 OR S6 OR S7	16,748
S16	TX ovulation induc*	1732
S15	TX icsi	1137
S14	TX ivf	4531
S13	TX vitro fertili?ation	6874
S12	TX blastocyst*	2176
S11	TX embryo*	22,594
S10	TX intracytoplasmic sperm injection*	884
S9	(MM "Fertilization in Vitro")	3392
S8	(MM "Embryo Transfer")	1088
S7	TX disengage*	2122
S6	TX frozen	8196
S5	TX Vitrif*	448
S4	TX thaw*	1733
S3	TX freez*	4646
S2	TX (cryopreservat* or cryofixation or cryonic suspension)	2630
S1	(MH "Cryopreservation+")	2443