Nine week old embryo. It can also be performed to confirm the results of a pregnancy test or just to provide you with some reassurance that all is progressing as it should be. Take a look at each week of your pregnancy, from conception to birth, with our comprehensive email newsletters. It should also present a strong heartbeat, with the heart rate around and beats per minute. Gender Don't know yet Boy Girl. If we cannot see a heartbeat then this is either due to the pregnancy being too early this is the commonest reason or that the pregnancy is found to be not viable. What will I learn from a dating scan?
No analgesia is required for this ultrasound.
First Trimester / Dating Ultrasound
The most accurate time is between 8 and 11 weeks gestation. Transvaginal ultrasound is safe and commonly performed during all stages of pregnancy, including the first trimester. Some women are uncertain of their last menstrual period LMP or have irregular menstrual cycles, making it difficult for their doctor to correctly estimate when the baby is due. Was this article helpful? Transvaginal ultrasound usually produces better and clearer images of the female pelvic organs including the developing pregnancy, because the ultrasound probe lies closer to these structures. By 6 to 7 weeks gestation the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage 90 to beats per minute under 6 to 7 weeks, then to beats per minute as the baby matures. At weeks gestation, a small gestation pregnancy sac is seen within the uterus.