ratio derived from the for low-mass and high-mass protostellar systems including data from both this study and the literature (see Appendix C for references). Upper and lower limits are presented as arrows. Only D/H ratios derived from interferometric observations are included to minimize effects of beam dilution and to exclude any contribution from larger scales. The of IRAS 2A and IRAS 4A were derived using older spectroscopic data (Taquet et al. 2019).