BGN and dystocia: For example, the observation that the Bgn+/−Dcn−/− females are less likely to suffer from dystocia than the Bgn−/−Dcn−/− may indicate some functional overlap between the two proteoglycans, given that the presence of the one biglycan allele is able to partially compensate for the dystocia phenotype predominantly caused by the absence of decorin alleles.