What Are The Chances Of Miscarriage After An Injury In The Abdominal Area?

Hi my girl fried is 10 weeks pregnant her 7 year old cousin jumped on her stomach but he didnt know she was pregnant he was jumping on the bed and fel and landed on her stomach she is in alot of pain when she mooves but no signs of a misscarige yet im really worried she mite miscarriage latter on today becase of how hard he fel on her do you think if she is going to miscarriage if she did not when it hapend could it happen latter in the day im really worried and hope are baby is ok