Anal pit visualisation during routine ultrasound screening

The dataset includes images routinely collected in a private fetal-maternal medicine clinic by experts in prenatal ultrasound. It can be used as teaching material or for training AI models. The dataset includes prenatal ultrasound visualization of the perianal muscular complex, often referred to as a "target sign." The gestational age of the included fetuses ranges between 20 and 38 weeks of gestation. In addition to the anonymized images, a table containing file names, ID numbers (1 to 827), and gestational ages is attached.