 [ Symptoms ] i had unprotected sex during my infertile days can i be pregnant [ Disease ] to distinguish which type of diabetes a person has ask for the c peptide and autoantibodies test type 1 is will have positive autoantibodies gad 65 ica iaa and low c peptide type 2 is will have negative autoantibodies and high c peptide remember anyone at any age can develop type 1 diabetes it is not just a child is disease that is one reason the name changed from juvenile diabetes to type 1 diabetes