Table 2.

Top 14 keywords.

Number	Keywords	Count	Centrality
1	Infertility, female	141	0.56
2	Acupuncture therapy	141	0.83
3	Polycystic ovary syndrome	71	0.16
4	Clinical research	43	0.16
5	Anovulation	40	0.06
6	Infertility, male	25	0.15
7	Moxibustion	20	0.07
8	Clomiphene	18	0.02
9	Acupoint catgut embedding	17	0.08
10	Electroacupuncture	16	0.03
11	Luteinized unruptured follicle syndrome	14	0.03
12	Promoting ovulation	11	0.03
13	Endometrial receptivity	10	0.03
14	Warm needling	10	0