Reliability of ultrasound dating

Transvaginal scans may be used early in pregnancy to diagnose potential ectopic or molar pregnancies.

An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman’s abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta.

Although the terms ultrasound and sonogram are technically different, they are used interchangeably and reference the same exam.

However, many differences in each woman’s cycle may hinder the accuracy of the conception date calculation.

The viability of sperm varies as well, which means intercourse three to five days prior to ovulation may result in conception.

The traditional ultrasound procedure involves placing gel on your abdomen to work as a conductor for the sound waves.

Your healthcare provider uses a transducer to produce sound waves into the uterus.It may also be possible to determine the gender of your baby during this ultrasound.Several factors, such as the stage of pregnancy and position of the fetus, will influence the accuracy of the gender prediction.Advanced Ultrasound – This exam is similar to the standard ultrasound, but the exam targets a suspected problem and uses more sophisticated equipment.Doppler Ultrasound – This imaging procedure measures slight changes in the frequency of the ultrasound waves as they bounce off moving objects, such as blood cells.If you receive an ultrasound exam after week 6, your healthcare provider will begin to be concerned, if there is no gestational sac.

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