You may have a earlier scan, if you are experiencing pain or bleeding for example or unsure of LMP dates.Transabdominal ultrasound (TAU) and also the transvaginal ultrasound (TVU) are valuable diagnostic tools in obstetrics and gynecology.It initially appears as a round, anechoic structure.In experienced hands, it may be detected as early as 30 days gestation by TVU.Very small and very large babies have higher mortality and morbidity rates than infants of normal size .
If cardiac activity can be detected but the embryo is not measurable, the GA is about 5.5 to 6.0 weeks.
While your sonographer takes measurments they will explain what you are looking at.
It may not be easy for you to make out what you are seeing on the screen in the early scans.
It is recommended that all pregnant women have a scan in the first trimester, to establish the date when the baby is due, check the number of babies also the position of the placenta.
First trimester ultrasonic scans may show 'soft' markers for chromosomal abnormalities, such as the absence of fetal nasal bone or an increased fetal nuchal translucency (back of the neck) to enable detection of Down syndrome fetuses.