What are the symptoms of threatened miscarriage?

Patient's question:

I got married last year. Recently, I've been experiencing lower abdominal pain, especially during my period. I'm very worried about it affecting my fertility, and I'm also extremely sensitive to cold and coldness. What are the symptoms of threatened miscarriage?

Doctor's answer:

1. Amenorrhea
Most patients with natural miscarriage have a clear history of amenorrhea.
2. Vaginal bleeding and abdominal pain
The first symptom is often vaginal bleeding, which is usually light in amount and dark red in color, or may appear as blood-stained leukorrhea. However, the duration can sometimes last for 4 to 5 days or even more than a week. Several hours to several weeks after the bleeding begins, mild lower abdominal pain or lower back pain may accompany it. After 12 weeks of pregnancy, patients may sometimes experience intermittent abdominal pain.
During gynecological examination, the cervical os is closed, no products of conception are expelled, and the size of the uterus is consistent with the duration of amenorrhea.