For instance, if your period starts on the 5th April, then your estimated due date for delivery is the 12th January.The dating scan is an ultrasound scan that can be done as early as six weeks after the last period, but the dating scan will be most accurate when done between 8 and 12 weeks gestation.Research shows that routine obstetric ultrasound before 24 weeks gestational age can significantly reduce the risk of failing to recognize multiple gestations and can improve pregnancy dating to reduce the risk of labor induction for post-dates pregnancy.There is no difference, however, in perinatal death or poor outcomes for babies.If we have done a previous ultrasound, we can see if the baby is growing appropriately.Often will be able to bring a few visitors to your exam if you wish. At the end of the examination the Doctor prepares the report with a computer program called BABE.Dating a pregnancy accurately at the earliest possible time is important.In a normal pregnancy it does not matter what the dates are, but if anything should go wrong it becomes very important as to what treatments may be prescribed.
Features include the forehead at 10 o'clock, the left ear toward the center at 7 o'clock and the right hand covering the eyes at .
In normal state, each body tissue type, such as liver, spleen or kidney, has a unique echogenicity.
Fortunately, gestational sac, yolk sac and embryo are surrounded by hyperechoic (brighter) body tissues.
This scan is performed in early pregnancy to determine the age of the pregnancy (also known as the gestational age) using measurements.
The measurements are from one end of the fetus to the other, known as the crown-rump length, or CRL. This scan is usually done if you are unsure about the dates of your last menstrual period (LMP) or have irregular periods.
Most of the images can be obtained by transabdominal ultrasound (this involves scanning through your lower abdomen) using a probe and gel on your skin. Sometimes if the pregnancy is early or better images of your uterus or ovaries is required a transvaginal ultrasound scan is required.