The evaluation of a threatened miscarriage begins with a history and physical exam.

Physical findings in a woman with a threatened miscarriage may include:

• Vaginal bleeding:
• Bleeding from the uterus
• Cervical dilation:
• The entrance to the uterus opens
• Lower abdominal tenderness

Tests are not necessary to make the diagnosis of threatened miscarriage.

Tests that may be used to evaluate a threatened miscarriage may include:

• Coagulation profile
• Complete blood count
• Rh factor
• A part of a person's blood type that is reported as either positive or negative.
• Serum HCG level
• Pregnancy ultrasound