Preparation for a dating ultrasound

Transvaginal ultrasound during all stages of pregnancy is safe and will not harm either you or your baby.Your sonographer will be experienced at performing these ultrasounds during pregnancy.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.An ultrasound, also called a sonogram, can help monitor normal fetal development and screen for any potential problems.

The average number of ultrasounds varies with each pregnancy.the baby and its heart beat can be detected relatively easily with trans-abdominal and trans-vaginal examination.This is presuming that the pregnancy is actually at this stage of development.5 ½ weeks gestation means 5 ½ weeks from the first day of the last menstrual period, which is usually about 3 ½ weeks from the date of conception (confusing, isn’t it!) the fetus is clearly seen on trans-vaginal ultrasound and the heart beat can be seen at this early stage (90 to 110 beats per minute under 6 to 7 weeks, then 110 to 200 beats per minute as the baby matures).

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