Table 1.

PubMed retrieval strategies.

ID	Query
#1	“Abortion, Induced” [Mesh]
#2	((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((Induced Abortion[Title/Abstract]) OR (Abortions, Induced[Title/Abstract])) OR (Induced Abortions[Title/Abstract]))) OR (Abortion (Induced)[Title/Abstract])) OR (Abortions (Induced)[Title/Abstract])) OR (Abortion Rate[Title/Abstract])) OR (Abortion Rates[Title/Abstract])) OR (Rate, Abortion[Title/Abstract])) OR (Rates, Abortion[Title/Abstract])) OR (Abortion Techniques[Title/Abstract])) OR (Abortion Technique[Title/Abstract])) OR (Technique, Abortion[Title/Abstract])) OR (Techniques, Abortion[Title/Abstract]))) OR (Abortion Technics[Title/Abstract])) OR (Abortion Technic[Title/Abstract])) OR (Technic, Abortion[Title/Abstract])) OR (Technics, Abortion[Title/Abstract])) OR (Abortion, Drug-Induced[Title/Abstract]))) OR (Abortion, Drug Induced[Title/Abstract])) OR (Abortions, Drug-Induced[Title/Abstract])) OR (Drug-Induced Abortion[Title/Abstract])) OR (Drug-Induced Abortions[Title/Abstract])) OR (Previous Abortion[Title/Abstract])) OR (Abortion, Previous[Title/Abstract])) OR (Abortions, Previous[Title/Abstract])) OR (Previous Abortions[Title/Abstract])) OR (Abortion History[Title/Abstract])) OR (Abortion Histories[Title/Abstract])) OR (Histories, Abortion[Title/Abstract])) OR (History, Abortion[Title/Abstract])) OR (Abortion, Saline-Solution[Title/Abstract])) OR (Abortion, Saline Solution[Title/Abstract])) OR (Abortions, Saline-Solution[Title/Abstract])) OR (Saline-Solution Abortion[Title/Abstract])) OR (Saline-Solution Abortions[Title/Abstract])) OR (Abortion, Soap-Solution[Title/Abstract])) OR (Abortion, Soap Solution[Title/Abstract]))) OR (Abortions, Soap-Solution[Title/Abstract])) OR (Soap-Solution Abortion[Title/Abstract])) OR (Soap-Solution Abortions[Title/Abstract])) OR (Anti-Abortion Groups[Title/Abstract]))) OR (Anti Abortion Groups[Title/Abstract])) OR (Anti Abortion Groups[Title/Abstract])) OR (Group, Anti-Abortion[Title/Abstract])) OR (Groups, Anti-Abortion[Title/Abstract])) OR (Embryotomy[Title/Abstract]))) OR (Embryotomies[Title/Abstract])) OR (Fertility Control, Postconception[Title/Abstract])) OR (Postconception Fertility Control[Title/Abstract])) OR (Abortion Failure[Title/Abstract])) OR (Abortion Failures[Title/Abstract])) OR (Failure, Abortion[Title/Abstract])) OR (Failures, Abortion[Title/Abstract])) OR (Abortion, Rivanol[Title/Abstract]))) OR (Abortions, Rivanol[Title/Abstract]))) OR (Rivanol Abortion[Title/Abstract])) OR (Rivanol Abortions[Title/Abstract])
#3	#1 OR #2
#4	“Ethinyl Estradiol” [Mesh]
#5	((((((((((((((((((Estradiol, Ethinyl[Title/Abstract]) OR (Ethynyl Estradiol[Title/Abstract])) OR (Estradiol, Ethynyl[Title/Abstract])) OR (Ethinyloestradiol[Title/Abstract])) OR (19-Norpregna-1,3,5(10)-trien-20-yne-3,17-diol, (17alpha)- Ethinyl Estradiol Hemihydrate[Title/Abstract])) OR (Hemihydrate, Ethinyl Estradiol[Title/Abstract])) OR (Ethinyl Estradiol, (8 alpha)-Isomer[Title/Abstract])) OR (Ethinyl Estradiol, (8 alpha,17 alpha)-Isomer[Title/Abstract])) OR (Ethinyl Estradiol, (8 alpha,9 beta,13 alpha,14 beta)-Isomer[Title/Abstract])) OR (Progynon C[Title/Abstract])) OR (Microfollin[Title/Abstract])) OR (Microfollin Forte[Title/Abstract])) OR (Ethinyl-Oestradiol Effik[Title/Abstract])) OR (Ethinyl Oestradiol Effik[Title/Abstract])) OR (Ethinylestradiol Jenapharm[Title/Abstract])) OR (Jenapharm, Ethinylestradiol[Title/Abstract])) OR (Lynoral[Title/Abstract])) OR (Estinyl[Title/Abstract])) OR (Ethinyl Estradiol, (9 beta,17 alpha)-Isomer[Title/Abstract])
#6	#4 OR #5
#7	#3 AND #6

Mesh, medical subject headings.