The miscarriage in the sixth month of pregnancy is related to the following aspects: 1. chromosomal abnormalities of the fetus, chromosomal abnormalities are the main cause of miscarriage. 2. chorioamnionitis, fetal membranitis and damage to the endometrium can also cause miscarriage. 3. the enlarged uterus receives contractions caused by external forces, which can also lead to miscarriage. 4. uncontrolled sexual life can also cause miscarriage. 5. excessive exertion, fatigue and shouting after anger can also cause miscarriage. 6. The first thing you need to do is to have a good time.