Whether or not to hold urine during an ultrasound in early pregnancy depends on the type of ultrasound chosen. If you choose abdominal ultrasound, you will need to hold urine because the gestational sac is smaller at this time and cannot be seen clearly without filling the bladder. If you do vaginal ultrasound, you don’t need to hold your urine. Vaginal ultrasound is clearer than abdominal ultrasound and can detect the location of the gestational sac earlier, but if you do vaginal ultrasound in the early stages of pregnancy, it may cause vaginal cramps, which may trigger uterine contractions and increase the chances of miscarriage. During pregnancy, especially in the first trimester, you should pay attention to rest, relax and do a good job of keeping the baby alive.