All of the following statements are true about development dysplasia (DDH) of the hip, except -: (A) It is More common in females, (B) Oligohydranmios is associated with a higher risk of DDH, (C) The hourglass appearance of the capsule may prevent a successful closed reduction, (D) Twin pregnancy is a known risk factor
Answer is D. "Uterus in twin pregnancy cannot be regarded as a risk factor for DDH". — Journal of pediatric orthopedics

DDH is more common in females.
Oligohydramnios is a risk factor for DDH.