Pregnancy dating and viability

In about 5- 10% of scans we are unable to achieve every view that we need, and you will be asked to wait a little while of come back on another day.Ultrasound uses sound waves, not ionizing radiation like x-rays.Ultrasound examination is never 100% accurate at determining the fetal sex.But if you want to know the sex, please let us know at the beginning of the examination so that we have several opportunities to view the region, and improve our accuracy for you.The first two weeks of your pregnancy includes the time of your period, ovulation and fertilization.Conception occurs approximately 14 - 16 days after the first day of your last menstrual period (LMP).For structural defects, better views are obtained later on in the pregnancy. Accuracy: This depends on the experience of the sonologist and on the condition being looked for.

With the three-dimensional scan, a computer rapidly stores a series of images to create a life-like picture of the baby and doctors are able to see a cross-section of any part of the body.Mothers look forward to the ultrasound examination because it gives them a first glimpse of their baby.At the same time, doctors and midwives use the ultrasound to gather a wealth of information about the baby and the pregnancy.It is sometimes called an "anomaly scan" because fetal abnormalities are looked for at this time.Fluid in the bladder provides a clear "window" to the pregnancy.

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