Miscarriage in the sixth month of pregnancy usually belongs to late miscarriage, mainly considering the problems of the uterus and the cervix, usually caused by longitudinal septum or adhesions in the uterine cavity, or abnormal narrowing of the uterus, cervical insufficiency, but of course there are also infectious factors, such as streptococcal infection, mycoplasma infection, or even vaginal inflammation in more serious cases, the episodic infection leads to premature rupture of the fetal membranes, resulting in miscarriage. There are also ways to relieve these two aspects. If at around 24 weeks, you feel a distinct sensation of falling or contractions, you can have an ultrasound to measure the length of the cervical canal and check for funnel changes, and you can also use test paper to check the fibrin of the cervix to determine if a preterm abortion has occurred. For cervical insufficiency, cervical cerclage can be performed during pregnancy, which is also a way to treat late-term miscarriage.