Experimental group
Rhizoma Cyperi, Radix Cyathulae, Rhizoma Zingiberis, Fructus Amomi, Radix Angelicae sinensis, Fructus Lycii, Cortex Cinnamomi, Radix Glycyrrhizae, Radix Paeoniae Alba, Radix Rehmanniae Preparata, Fructus Leonuri, Herba Asari, Radix Linderae, Radix Notoginseng, Radix Scutellariae, Rhizoma Atractylodis Macrocephalae
CORTEX
These women received DKP (Luwang, Jilin, China) 10.8 g twice a day orally from the fifth day of the menstrual cycle until 14 days after ovulation. The other drug regimen (hormonal treatment) was the same as that in the control group.DKP is mainly composed of the following 30 medicinal herbs: Radix Ginseng, Cornu Cervi Pantotrichum, Radix Angelicae sinensis, Radix Rehmanniae Preparata, Stigma Croci, Caulis Spatholobi, Radix Notoginseng, Radix Paeoniae Alba, Rhizoma Atractylodis Macrocephalae, Fructus Lycii, Radix Scutellariae, Rhizoma Cyperi, Fructus Leonuri, Rhizoma Ligustici Chuanxiong, Cornu Cervi Degelatinatum, Colla Corii Asini, Rhizoma Corydalis, Flos Carthami, Herba Leonuri, Faeces Togopteri, Poria, Radix Bupleuri, Radix Linderae, Fructus Amomi Villosi, Cortex Eucommiae, Rhizoma Zingiberis, Herba Asari, Radix Cyathulae, Cortex Cinnamomi, and Radix Glycyrrhizae. The “Dingkun pill” standard is approved by the China Food and Drug Administration (CFDA).Serum hCG levels were measured in both groups 14 days after ovulation. If hCG >10 IU/L, estradiol valerate tablets were stopped and only dydrogesterone was given until 12 weeks of pregnancy. If hCG<10 IU/L (i.e., no pregnancy), the study was continued accordingly; i.e., treatments were continued on the 5th day of the next menstrual cycle until patients became pregnant or until the end of the third cycle at the end of the study.