Table 3 First and mid-trimester fetal anatomy assessment
From: Uncovering ethical biases in publicly available fetal ultrasound datasets
Organ | First trimester | Mid-trimester |
|---|---|---|
Head | Cranial bone ossification, normal choroid plexus, and midline falx | Intact cranium, cavum septi pellucidi, midline falx, thalami, cerebral ventricles, cerebellum, cisterna magna |
Neck | Proper alignment of the neck with the trunk and identification of hygromas and jugular lymph sacs | Absence of masses |
Face | Eyes with lens, nasal bone, normal profile/mandible, intact lips | Both orbits present, median facial profile, mouth present, upper lip intact |
Spine/Extremities | Normal vertebral alignment and integrity, intact overlying skin, four limbs each with three segments, hands and feet with normal orientation | No spinal defects or masses (transverse and sagittal views), arms and hands present, normal relationships, legs and feet present, normal relationships |
Chest | Symmetrical lung fields, no effusions or masses | Normal appearing shape/size of chest and lungs |
Heart | Cardiac regular activity, four symmetrical chambers | Heart activity present, four-chamber view of heart in normal position, aortic and pulmonary outflow tracts; no evidence of diaphragmatic hernia |
Abdomen | Stomach present in the left upper quadrant, bladder, kidneys, normal cord insertion, no umbilical defects | Stomach in normal position, bowel not dilated, both kidneys present, cord insertion site |
Placenta | Size and texture | Position, no masses present, accessory lobe |
Cord | Three-vessel cord | Three-vessel cord |
Genitalia | - | Male or female |
