An ultrasound can detect early pregnancy. Vaginal ultrasound, also known as vaginal ultrasound, is a type of ultrasound that is performed by placing a probe into the woman’s vagina or rectum. Women who suspect pregnancy can use ultrasound to check whether they are pregnant and whether the embryo is in the uterus, usually after 35-40 days of menopause. Compared to abdominal ultrasound, the ultrasound is closer to the ovaries and can examine the uterus and ovaries more accurately. With the gradual growth of the intrauterine gestational sac, the ultrasound can also clearly show the heartbeat of the fetus and determine the week of pregnancy according to the development of the fetus. It can also detect the presence of ectopic pregnancy in time. If the HCG level is elevated and there is no gestational sac in the uterus, ectopic pregnancy is suspected. Ultrasound is less time consuming than abdominal ultrasound, does not require holding urine, and is easier to perform, especially for women who are fat and are not used to holding urine, ultrasound is the preferred way to detect early pregnancy. Although there are many advantages of ultrasound examination, it is not recommended if there is abnormal bleeding in early pregnancy or if it is accompanied by paroxysmal abdominal pain, so as not to cause infection, miscarriage and other adverse consequences. Some women may experience a small amount of bleeding or discomfort after having an ultrasound. Don’t be too nervous and worried, you can check the HCG level and progesterone value and pay attention to rest.