 According to the "Journal Citation Reports", the journal has a 2012 impact factor of 12.44, ranking it 14th out of 181 journals in the category "Cell Biology", third out of 40 journals in the category "Developmental Biology", and 7th out of 158 journals in the category "Genetics & Heredity".Over 1999–2004, the journal was ranked fifth in the "Molecular Biology and Genetics" category according to "ScienceWatch", with an average of 47 citations per paper.All issues are available online via the journal website as PDFs, with a text version additionally available from August 1997.