The present invention relates to the field of diagnostic methods. Specifically, the present invention relates to a method for assessing the quality of a biological sample comprising the steps of determining in a sample the amount of at least one biomarker from Tables 1, 1&prime, 2, 2&prime, 3, 3&prime, 4, 5, 5&prime, 6, 7, and/or 8 and comparing the said amount of the at least one biomarker with a reference, whereby the quality of the sample is assessed. The invention also relates to tools for carrying out the aforementioned method, such as devices and kits.