Transvaginal ultrasound is transvaginal ultrasound, there is no specific requirement for coitus before doing transvaginal ultrasound, but coitus is generally not recommended to avoid bacteria entering the vagina leading to vaginitis and affecting the results.
Transvaginal ultrasound can observe a woman’s uterus, adnexa, and pelvis, and is suitable for women who have already had sex, and is generally more accurate than transabdominal ultrasound, which can be performed the day before the vaginal ultrasound, but is generally not recommended to cohabit. This is because intercourse may allow bacteria to enter the vagina.
If you experience any physical discomfort after having a vaginal ultrasound, it is recommended that you go to the hospital in a timely manner, and treat accordingly under the guidance of your doctor.