X-STR-Test: Grandmother (Father’s side) with Grandchildren

F. is 76. Her son passed away last year due to a car accident. A women contacted F. recently, the women said that she and F.’s son had a daughter together. F. was delighted to hear the news and to dispel any doubt would like to have a test carried out to confirm that the little girl is really her biological granddaughter. Thanks to the X-STR-test, this is not a problem.