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One randomized controlled trial, however, came to the result of a higher perinatal death rate of normally formed infants born after 24 weeks exposed to Doppler ultrasonography (RR 3.95, 95% CI 1.32–11.77), but this was not a primary outcome of the study, and has been speculated to be due to chance rather than a harmful effect of Doppler itself.
It's been known that smoking while pregnant can harm babies, and now researchers in England believe they've been able to show the effects using ultrasound scans. Researchers at Lancaster and ...
deterministic effects (harmful tissue reactions) due in large part to the killing/ malfunction of cells following high doses. The determinstistic effects have been studied at for example survivors of the atomic bombings of Hiroshima and Nagasaki and cases of where radiation therapy has been necessary during pregnancy:
Medical ultrasound includes diagnostic techniques (mainly imaging techniques) using ultrasound, as well as therapeutic applications of ultrasound. In diagnosis, it is used to create an image of internal body structures such as tendons, muscles, joints, blood vessels, and internal organs, to measure some characteristics (e.g., distances and velocities) or to generate an informative audible sound.
Many babies with chromosome problems do not show any signs on ultrasound. Other factors are discussed in counseling include: Mother's age at the expected date of delivery; The results of the Expanded AFP blood triple test; Evidence of other "fetal findings" seen on the ultrasound that suggest a chromosome problem.
Specialized early pregnancy departments have estimated that between 8% and 10% of women attending for an ultrasound assessment in early pregnancy will be classified as having a PUL. [5] The true nature of the pregnancy can be an ongoing viable intrauterine pregnancy, a failed pregnancy, an ectopic pregnancy or rarely a persisting PUL. [5]
The results of the blood test are then combined with the NT ultrasound measurements, maternal age, and gestational age of the fetus to yield a risk score for Down syndrome, trisomy 18, and trisomy 13. First Trimester Combined Test has a sensitivity (i.e. detection rate for abnormalities) of 82–87% and a false-positive rate of around 5%. [74] [75]
Still, first, she needed to undergo a pregnancy test, as radiation can be dangerous for babies. The results were undeniable, with the first signs being high amounts of human chorionic gonadotropin ...