Ultra sound scans have been done already during the second semester of pregnancy to determine the growth of the fetus and its well being. The final ultrasound at 36 weeks of pregnancy is done to check whether the baby is in the right position for birth and whether a c section might be required. Following this the mother to be will have to go for frequent check ups to her doctor to ensure that everything is normal and that the birth will be either through the vagina or whether anything else has to be done. In the initial 3d ultrasound scans in 36 weeks pregnant women, measurements...
...of various parts of the fetus are taken to confirm the right gestational period and also to see if there are any abnormalities. The measurement from the top of the head up to the bottom of the spine gives the doctor a clear indication of the gestational age prior to the 15th week of pregnancy. Apart from indications which the measurements of the fetus with a 3d ultrasound test scan provide another important factor is the abdominal circumference measurement. This gives the doctor an indication of the weight and the size of the baby and not just the gestational period.
For the growth of baby lengthwise the femur is measured and this is an indication of the growth progress of the baby. The femur is the longest bone in the body. This also helps to rule out any possibilities of a stunted growth like dwarfism in the baby. Another important measurement is that of the head. Though not as reliable as the other measurements it is still done. Measurements of the distance between the eyes and the sockets are also taken after this scan has been d one.
At 36 weeks the baby is around 5.9 pounds heavy and is 18.6 inches in length or could even be longer. The baby continues to gain weight after this stage of pregnancy. To gauge the actual time of the last ovulation and check the gestational period and ovulation ultrasound helps in giving an accurate date. Many women have a cycle which is not just four weeks and could be either more than that or less than it. This makes it difficult to decide on the time and date of conception and a scan proves to be more reliable.
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