父母来美探亲，延期了一次，到三月底到期，但是１月份母亲摔了一跤，骨折了，我想再帮他们延期一次，彻底修养好了再回去，不知道第二次,延期半年的成功率大不大，
-I saw someone like your parents did it sucessfully. So, just try it by providing the evidences of your mother's injure. Also address that your father needs to take care of your mother, etc.
还有会不会影响下次签证。
-No.
请位专家帮忙分析一下，谢谢。
