What are the causes of echogenic bowel in fetuses?

Various things: Echogenic bowel can be the result of faulty technique in setting the gain settings of the ultrasound machine. If persistent and reproducible, there can be associations with cystic fibrosis, bowel obstruction, hirschsprung's disease, various infection, and chromosomal abnormalities. 60% of cases will turn out normal with the remainder having a variety of conditions.