Transvaginal ultrasound dating accuracy
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.
Transvaginal ultrasounds produce clear images of the fetus and uterus and surrounding structures that help doctors confirm the presence of a pregnancy, establish a pregnancy timeline, and gain insight into the health of the pregnancy.
I *feel* as if I have had some "phantom" periods in the past without bleeding but there is nothing inconclusive about that.For example, if you have experienced vaginal bleeding, problems such as a miscarriage in a previous pregnancy, or other circumstances that make you or your healthcare provider more alert to potential problems, you may be referred for an early pregnancy ultrasound.