A substance or reactant intended to be used together with a parent IVD to perform a specific function in an assay that is intended to be used for the qualitative and/or quantitative detection of nucleic acid from multiple types of microorganisms associated with neonatal disease, in a clinical specimen, using a nucleic acid technique (NAT). Microorganisms detected may include, but are not limited to, Group B Streptococcus/Streptococcus agalactiae (GBS), Listeria monocytogenes, Escherichia coli (E. coli), cytomegalovirus, Staphylococcus aureus, Chlamydia trachomatis and Ureaplasma urealyticum/parvum.