Sep 15, · In fact, the same study published in Obstetrics and Gynecology concluded that 65 percent of parents preferred to know the baby's sex after an amniocentesis compared to 28 percent who preferred an ultrasound. This was despite the fact that percent of women believed that an ultrasound was a reliable means of determining the sex of her baby.
"Sex is 50/50, so any old wives tale or gimmick will be correct 50 percent of the time," Dr. Sasan points out. Still, even if early sonograms aren't an accurate way to predict gender, we doubt.
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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 refer to the same exam. There are basically seven different ultrasound exams, but the basic process is the same.