Which features are more likely to occur in a female fetus?

The presence of congenital hip dislocation is notably more common in female fetuses compared to males. This condition, also known as developmental dysplasia of the hip (DDH), occurs when the hip joint does not properly form in infants and young children. Females are statistically more likely to be diagnosed with this condition due to a combination of factors, including hormonal influences during pregnancy and structural differences in the pelvis.

Pyelectasis, Hirschsprung disease, and clubfoot do not show the same significant gender predisposition. Pyelectasis, which is the dilation of the renal pelvis, can occur in both males and females without a strong association with either gender. Similarly, Hirschsprung disease is a genetic disorder typically more common in males, and clubfoot tends to affect boys more frequently than girls. Thus, when considering the likelihood of these conditions occurring in female fetuses, congenital hip dislocation stands out as the most relevant choice.