The fact that you are not pregnant for several months may be due to physiological factors such as nervousness, too little sex, or illnesses such as polycystic ovary syndrome. 1. Physiological factors: excessive tension, irregular work and rest, and a low number of sexual intercourse during the preparation for pregnancy can lead to difficulties in getting pregnant, and the situation of preparing for pregnancy for a few months is not conceived. 2. Polycystic Ovary Syndrome (PCOS): The cause of PCOS is not yet clear, and it may be caused by a combination of genetic and environmental factors. The patient can appear menstrual disorders, hairy, acne, infertility and other symptoms, if the woman has this kind of disease, may appear to prepare for pregnancy for a few months did not conceive the situation. There are many reasons why a woman may not conceive after several months of preparation, so it is recommended that both spouses go to a regular hospital and undergo a relevant examination to determine the cause of the disease.