Table 1.

Search strategy for the PubMed.

NO.	Search item
#1	Hyperemesis Gravidarum[MeSH Terms]
#2	Hyperemesis gravidarum[Title/Abstract] OR Pernicious Vomiting of Pregnancy [Title/Abstract] OR Pregnancy Pernicious Vomiting[Title/Abstract]
#3	#1 OR #2
#4	Traditional Chinese Medicine External Treatment[MeSH Terms]
#5	Acupuncture[Title/Abstract] OR Acupoint Pressing[Title/Abstract] OR Acupoint Sticking[Title/Abstract] OR Acupoint Injection[Title/Abstract]
#6	#4 OR #5
#7	Randomized Controlled Trial[Publication Type]
#8	Randomized Controlled Trial[Title/Abstract] OR Randomized[Title/Abstract] OR Double-blind method [Title/Abstract] OR Randomly[Title/Abstract]
#9	#7 OR #8
#10	#3 AND #6 AND #9