Bleeding from intercourse without abdominal pain in the fifth month of pregnancy can be caused by low placental state and cervical lesions. At this time, pregnant women need to immediately go to the hospital for ultrasound examination to clarify the specific causes and then carry out symptomatic treatment. Common causes and treatment 1, placenta hypoplasia: mainly refers to the placenta located in the lower part of the uterus before 28 weeks of pregnancy, the lower edge of the placenta is close to but does not reach the inner cervical opening, also known as hypoplasia, which is a kind of placenta praevia. Anterior placenta means that the placenta is attached to the lower segment of the uterus and the edge of the placenta reaches or covers the inner cervical opening. Both of them can be misaligned and separated due to the enlargement of the uterus and the inability of the placenta to extend, resulting in painless vaginal bleeding, which can be treated under the guidance of a medical professional to suppress contractions, correct anemia and control infection. Normally, you also need to avoid squatting, carrying heavy objects, trying not to go up and down stairs frequently, and sex should not be too frequent; 2. Cervical lesions: cervicitis, cervical polyps and other diseases during pregnancy may cause bleeding after sex, in most cases the bleeding is small and can be stopped naturally, it is recommended to seek medical attention in time and choose conservative treatment or surgery according to the condition. Pregnant women can have intercourse when they are 4-6 months pregnant, but they need to ensure local hygiene during intercourse and wash their genital organs with warm water before and after sex. During intercourse, pay attention to avoid compressing the pregnant woman’s abdomen, and it should not be too strong or too long. If a pregnant woman finds that she is experiencing discomfort during intercourse, she should stop in time to avoid affecting the health of the fetus.