Professor GUO Zhiqiang believes that the pathogenesis of luteal dysfunction infertility lies in yang deficiency

and yang qi gradually rising in luteal stage provides impetus for embryo growth and development

while yang deficiency may easily cause infertility. The basic principle of clinical treatment is to warm and supplement yang qi

and the prescriptions are based on the self-made Lianggu Decoction（两固汤）

which are made from Wuzi Yanzong Pills（五子衍宗丸） and Liuwei Dihuang Pills（六味地黄丸）

in which the drugs are modified according to different physiological periods

to achieve the purpose of warming and supplementing yang qi

solidify thoroughfare and conception channels

to help breed.