A woman presents at 20 weeks’ gestation reporting vaginal bleeding. The bleeding occurred 2 h ago and was bright red. She reported no abdominal pain with the bleeding and she had not had any previous episodes. She had had intercourse the previous evening. Her last cervical smear was normal 2 years ago. This is her first pregnancy and her current obstetric history is unremarkable with normal first-trimester scan and Down’s syndrome screening. She reports that her booking blood tests had been normal.
She is extremely anxious when seen, concerned that she is going to have a miscarriage. Examination: The blood pressure is 105/65 mmHg and pulse 86/min. Abdominal examination confirms that the uterus reaches to 1 cm below the umbilicus. The uterus is soft and non-tender. The fetal heart is heard with the hand-held fetal Doppler ultrasound probe. Speculum examination reveals a reddened area…