Nourishing Kidney and Yuking Fetus Pill is a kind of proprietary Chinese medicine with the efficacy of preserving the fetus, which can be taken by women with fluid in the uterine cavity after pregnancy under the guidance of doctor for treatment. Nourishing Kidney and Yuking Fetus Pill is a common proprietary Chinese medicine mainly composed of Cuscuta chinensis, Radix et Rhizoma Gastrodiae, Radix Rehmanniae Praeparata, Radix et Rhizoma Ginseng, etc. It has the effects of tonifying the kidney and strengthening the spleen, nourishing the blood, stabilizing the fetus and strengthening the body, and is mainly used for the prevention and treatment of habitual miscarriage and preterm miscarriage in the presence of a weak spleen and kidney. Fluid accumulation in the uterine cavity after pregnancy may be caused by bleeding from embryo implantation, subchorionic hematoma, endometritis, etc. Pregnant women may have the possibility of pre-eclampsia. Therefore, pregnant women may take Zi Kidney Foetus Yuking Pills under doctor’s instruction for fertility preservation treatment to stabilize the uterus and reduce the risk of miscarriage. Pregnant women should prohibit coitus after taking Zi Kidney Yuk Fetus Pills, avoid eating radish, Semen Coicis, mung bean sprouts and other foods during the period of taking the pills, so as to avoid adverse reactions, and at the same time, pregnant women should also pay attention to observing their own changes, and comply with the doctor’s advice to repeat the examination on time.