Dating ultrasound 6 weeks
The fetal pole resembles a bean in shape, which the technician can look at and determine the head and rump ends of the embryo.
Seeing the fetal pole allows the sonographer to measure the size of the embryo.
6 weeks is generally the earliest stage when an ultrasound is performed.
It isn’t common practice to have one this early but you may have one ordered if there are any concerns.
Ultrasounds performed during the first 12 weeks of pregnancy are generally within 3 - 5 days of accuracy.
The most accurate time is between 8 and 11 weeks gestation.
Detecting a heartbeat at this stage indicates that the pregnancy will probably continue and not end in miscarriage, although this is not absolutely guaranteed.
For transvaginal ultrasound you can have an empty bladder Dating scans are usually recommended if there is doubt about the validity of the last menstrual period.
For example if you a tiny sac can be seen in the uterus, but the baby and its heart beat may not be detected yet.
Most dating scans are done with a trans-abdominal transducer and a fullish bladder.
If the pregnancy is very early the gestation sac and fetus will not be big enough to see, so the transvaginal approach will give better pictures.