AN EXPERT SYSTEM FOR DISEASE DIAGNOSIS PREGNANT WOMEN USING FORWARD CHAINING METHOD. Health is one of the important factors for pregnant women in conducting daily activities. However, some pregnant women do not care about their body condition so there are many  complaints,  causing  a  disease  in  pregnant  women.  Pregnant  women  can  be  affected  by pregnancy, the disease can be known from the symptoms it causes, but to know precisely what diseases suffered by pregnant women, requiring an expert or specialist doctor Content. In this study designed a system  of experts based on the website  using a  rule  base  with  the  method of forward  chaining inference aimed at helping pregnant mothers in diagnosing early pregnancy disease. This expert system is able to diagnose the disease suffered by the pregnant mothers according to the question of the symptoms asked to be answered by the pregnant women, so that the system will provide diagnostic results, details on diseases and treatment The disease.