The nerve preramus L4 , the femoral nerve, the obturator nerve and the communicating branch are liable to injury in the front of the ligamentum iliolumbale.
Within the first day the ductus arteriosus usually starts clamping shut, and within 3 weeks, it's completely closed off and turned into the ligamentum arteriosum.
支、股
带
第1天内，动脉导
通常
始闭合，
闭，变成动脉韧带。
