YunCheng Founder Dr. Wang Yin Files IPO Prospectus for Pioneering Natural Fertility Smart Device Developed After Studying in Germany
Dr. Wang Yin (left) attending in GermanySensiplanFounderDr. SottongUrsulaPh.D.（China）training, becoming one of the earliest authorized natural family planning trainers in China
In the female preconception market, YunCheng was the earliest entrant and is China’s first smart hardware device designed to help women conceive naturally.
In June 2013, Wang Yin, an engineering graduate from Tsinghua University, resigned from his coveted “iron rice bowl” job in Beijing and launched the research and development of the “Yuncheng” fertility aid project in Haidian District, Beijing. “By observing women’s physiological signals and integrating smart hardware, we aim to help women conceive naturally.” This was Wang Yin’s original motivation for starting his venture.
YunCheng has collected physiological cycle data from one million women, establishing a precise and continuous basal body temperature database. Among them, there are over 150,000 high-quality users, with more than 10,000 achieving successful natural pregnancies. From an engineering background to researching smart hardware for female preconception care, and from a stable government job to entrepreneurship, just how remarkable is the smart thermometer developed by Wang Yin?
When discussing the development process of “YunCheng,” Wang Yin was quite emotional. His friends, particularly those in long-distance marriages, often lamented, “We’re in our thirties and have been eager to have a baby for a long time. Even when we carefully timed intercourse to coincide with the optimal ovulation window, we frequently missed many opportunities due to difficulties in obtaining leave or conflicting schedules.”
Meanwhile, as environmental conditions deteriorate and life pressures mount in first- and second-tier cities, women face significant work-related stress, while men are experiencing declining sperm quality. Consequently, the natural fertility capacity of the population is decreasing, with data indicating that this issue affects a cumulative total of over 40 million people.
Wang Yin identified user needs and, after conducting in-depth market research, discovered that a German institution had developed a natural fertility management system (covering both conception and contraception) that requires no condoms, intrauterine devices, or medication, and has received positive user feedback. To this end, he personally visited the institution’s professors in Germany. After several rounds of discussions, the German institution agreed to license the system to him.
Upon returning to China, Wang Yin began planning how to implement the natural conception system. He had deep expertise in the Internet of Things (IoT), with technology and algorithms being his strengths, but he lacked knowledge in reproductive medicine. Therefore, he recruited numerous medical experts to serve as his advisory board. Additionally, aiming to master medical knowledge himself, he painstakingly studied a dense, over-1,000-page medical textbook.
After months of intensive research and development, Wang Yin integrated three modules—a Bluetooth thermometer, a mobile app, and a health cloud platform—into a single product named “Yun Cheng,” a name symbolizing the certainty of successful conception. This fertility aid accurately measures body temperature and incorporates multiple factors to help women identify their ovulation periods. As the company’s inaugural product, it is positioned as the premier preconception tool, the most professional contraceptive assistant, and the most considerate health manager.
In February 2016, the YunCheng team launched its exclusively designed second-generation product: the YunCheng Ovulation Pen, targeting the premium user market. Soon after, YunCheng began developing its third product: the YunCheng Smart Thermometer. Its main features include fertility tracking, contraception support, early pregnancy monitoring, menstrual cycle management, and fever detection for infants. The product is currently being crowdfunded on Taobao, having raised over RMB 1 million, with the campaign ending on January 18, 2017. After the crowdfunding concludes, it will have its exclusive launch on Tmall and be sold across all major e-commerce platforms in China, with a suggested retail price of RMB 198.
Although there are now many ways to conceive, such as in vitro fertilization (IVF) and surrogacy, Wang Yin advocates for Natural Family Planning, hoping that childbearing can be akin to organic food—growing naturally. He aims for YunCheng to offer a new, science-based lifestyle and to build a brand focused on health data management, with an emphasis on maternal and infant health.
Although currently operating in the female preconception care marketAPPMany, such as Dayima and Meiyou, rely on calendar-based predictions, whereas YunCheng uses basal body temperature for prediction, with its core focus being accurate and rapid measurement. The YunCheng thermometer employs sublingual measurement and transmits data to a smartphone via a low-power Bluetooth module.AppTransmits data, automatically plots basal body temperature curves, and tracks indicators such as cervical mucus, menstrual calendar, and sexual intercourse, thereby calculating the optimal days for conception. Currently, the measurement accuracy of its electronic thermometer rivals that of mercury thermometers, with an error margin of only0.05degree, with a measurement speed of60seconds, and it will be even faster in the future.
Users can connect a basal thermometer to their smartphone to collect basal body temperature data. The system intelligently analyzes the woman’s menstrual cycle phase, such as menstruation, safe period, and fertile window, to help target users achieve pregnancy or serve as a contraceptive aid. Additionally, the “Yuncheng” mobile app can track and record other health conditions, including cervical mucus, insomnia, medication use, illness, alcohol consumption, sexual intercourse, and stress levels.
Research indicates that if women engage in sexual intercourse during their fertile window, the probability of conceiving within two months can double. Tracking the fertile window enables women to conceive shortly after deciding to become pregnant. By analyzing basal body temperature and other natural physiological indicators, the YunCheng APP accurately predicts ovulation days and identifies optimal conception timing; its professional algorithms determine that the 48 hours preceding ovulation constitute the peak fertility period. Additionally, precise tracking of the ovulation cycle can aid in contraception, helping users avoid unnecessary physical harm, identify safe periods, and receive meticulous care. The app also provides reliable management for users with irregular menstrual cycles.
Well-known international counterparts include Germany’s Lady-Comp (Contraception Treasure), which has been on the market for over three decades. It is a dedicated computer device developed using microcontroller and temperature-sensing technologies to automatically record changes in women’s basal body temperature. Combined with an ovulation algorithm supported by clinical research data, it helps women achieve natural contraception and pregnancy planning. Its selling price in China reaches RMB 5,480.
However, the barrier to entry for smart hardware is not high, and competition is severely homogenized. A key challenge lies in how to more rapidly integrate various resources and compete with giants in the medical device sector. “I am confident in my algorithms and professional medical services. I will strive for refinement and specialization step by step, focusing on ‘solving problems’ rather than creating ‘flashy toys.’ After all, whether a device is wearable or not, the critical factor is not the hardware itself, but how it can be used to engage users and collect big data on the medical cloud, thereby providing better solutions for users.”
The future vision is to leverage innovative smart hardware to acquire user data, and through analysis, diagnosis, and intervention, build a platform connecting physicians, users, pharmaceutical companies, and insurers. This platform will enable physicians to manage patients and generate revenue, while helping users achieve natural conception.