Three months without pregnancy is normal is not certain, pregnancy is affected by a variety of factors, may be organic lesions leading to infertility, for the abnormal phenomenon, may also be missed ovulation, generally normal. Usually women without contraception sex more than 12 months without pregnancy can be called infertility, the cause of more, such as female tubal inflammation, female polycystic ovary syndrome leading to ovulation abnormalities, male azoospermia. There are even some unexplained infertility, such as infertility caused by the above reasons, which is usually abnormal and often requires treatment or assisted reproductive technology. Patients who are not pregnant after three months of uncontraceptive sex may have missed ovulation, which is generally normal, and can improve the relevant examinations to guide coitus, such as ultrasound can monitor ovulation to guide coitus at the same time. You can also rule out organic lesions of the ovary and uterus, and the patient can also monitor ovulation through ovulation test paper to guide cohabitation. If the patient is not pregnant after several times of ovulation monitoring and coitus, then further examination is needed, such as hysterosalpingography. Three months without pregnancy, you can go to the hospital in time, clear causes for targeted treatment.