Description of the pregnancy-test b-ultrasonic measurement data:
CRL--from the length of the fetal head to hips, also known as the \"head and WAIST TO HIP\". During the 8-11 week of pregnancy, each of the fetal development of the situation there is not much difference, so hospitals are often measured CRL to forecast production day.
BPD--head most long part between left and right sides of length, also known as the \"head in transverse diameter\". When could not be determined by CRL in the early days, often by BPD to forecasting; medium-term future, when the presumption of fetal weight and often need to measure the data.
FL--length of the thigh bones of the fetus, also known as the \"big foot long\". Thigh bone is the roots of the thigh to knee length. Generally around 20 weeks of gestation, by measuring the FL to check the condition of fetal development.
Thickness between before and after APTD--abdominal, also known as the \"before and after abdominal diameter.\" Check the State of development of the fetal abdomen and when the presumption of fetal weight, need to measure to the data.
TTD--width of the abdomen, also known as \"abdominal transverse diameter\". After 20 weeks of gestation, together with the APTD to check for fetal development. Sometimes measuring abdominal area.
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