All of the following statements are true about development dysplasia (DDH) of the hip, except -
"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.
It is More common in females
Oligohydranmios is associated with a higher risk of DDH
The hourglass appearance of the capsule may prevent a successful closed reduction
Twin pregnancy is a known risk factor