Pregnancy ultrasounds are performed mainly using transabdominal ultrasound.For many women, especially after 8 weeks gestation, sufficient information about the baby may be obtained with transabdominal ultrasound only.We usually get better images during transabdominal ultrasound if the bladder is partially filled, so to help your examination we ask you to drink water prior to the assessment.
The probe is covered with a disposable protective sheath.
A small amount of ultrasound gel is placed on the end of this probe.
A transvaginal ultrasound is usually required to see the baby at this stage of the pregnancy. Although the ultrasound may see your baby, it measures only a few millimetres long, and it is too early to always detect the baby’s heartbeat.
You should not be concerned if we cannot see the baby’s heartbeat at this early stage, as this can be normal.
The yolk sac is the other structure that is usually identified at this early stage.
The yolk sac lies within the gestation sac and looks like a little round circle inside the pregnancy sac.
A small amount of ultrasound gel is put on the skin of the lower abdomen, with the ultrasound probe then scanning through this gel.
The gel helps improve contact between the probe and your skin. It involves scanning with the ultrasound probe lying in the vagina.
However, in the early pregnancy, the developing embryo is very small (at 6 weeks gestation, the baby is only 5-9mm long) and a transvaginal ultrasound may be required to get a better image of the baby.
Transvaginal ultrasound is safe and commonly performed during all stages of pregnancy, including the first trimester. Transabdominal ultrasound involves scanning through your lower abdomen.
The corpus luteum will gradually resolve (get smaller) as the pregnancy continues.