We all know the importance of warmth in the reproductive cycle. For example, the hormone progesterone is known to have a thermogenic effect on the body and is responsible for preparing the endometrium for implantation of the egg after ovulation and fertilization. The importance of harmonizing Yin and Yang for conception cannot be overstated.

Although uterine cold is of course closely linked to Yang deficiency, deficiencies of Kidney Qi, Spleen Qi, blood deficiency and blood stasis are also commonly present where cold in the uterus is predominant. Nuan Gong Yun Zi Pian not only effectively warms the uterus but also tonifies blood without engendering stasis, boosts Kidney Qi, Yin and Yang while soothing the Liver and warming the meridians. This balanced approach makes Nuan Gong Yun Zi Pian an indispensable supplement in supporting fertility.^†

Nuan Gong Yun Zi Pian contains within it the classical formula Si Wu Tang or Four Substance Decoction: Dang Gui (Chinese Angelica root), Bai Shao (white Peony root), Shu Di Huang (processed Rehmannia root) and Chuan Xiong (Szechuan Lovage rhizome). Si Wu Tang is a fundamental formula used in Traditional Chinese Medicine to tonify the blood. Shu Di Huang and Bai Shao strongly nourish the blood and tonify the Liver and Kidneys. Shu Di Huang is said to nourish the Yin of the blood in particular. Powerful tonifying medicinal herbs such as these are known to be cloying in nature and may aggravate or even cause blood stasis, therefore Si Wu Tang also contains the Dui Yao pair (traditional combination) of Dang Gui and Chuan Xiong which nourish the blood while simultaneously dispelling and preventing stasis i.e. moving the blood. Chuan Xiong is said to treat the Qi of the blood, thereby supporting normal movement and preventing stasis. Dang Gui is a particularly important herb in the gynecological applications since it has the unique ability to both nourish and invigorate the blood. Dang Gui is sometimes referred to as the "female ginseng".

The herbs Ai Ye (Mugwort leaf) and Xiang Fu (Cyperus rhizome) are added to Si Wu Tang to specifically address blood deficiency with concurrent cold in the womb. Ai Ye is also known as mugwort or Japanese wormwood and is the herb used in moxibustion therapy because of its warming properties. Ai Ye is considered an emmenagogue, an herb which stimulates and encourages blood flow (circulation) in the pelvis and uterus.

Nuan Gong Yun Zi Pian also contains Bu Gu Zhi (Psoralea fruit), Yin Yang Huo (Horny Goat Weed), Xian Mao (Curculigo rhizome), Rou Gui (Cinnamon bark) and Du Zhong (Eucommia bark), herbs which powerfully warm and tonify Yang, support the Spleen, boost the Yin and Yang of the Kidneys while stabilizing Jing (essence) and warming the meridians.

This is a well balanced and effective formula which is indispensable in supporting female reproductive health in cases of cold and deficiency.