Several magnesium-doped calcium, calcium, strontium, and barium nanohydroxyapatites are synthesized using a saturated solution system (M2+/EDTA/PO4 (3-)) in a simple electrochemical cell. It was demonstrated that the nature of the precipitates does not depend on reaction time or subsequent treatments. Calcium apatite can be prepared from pH solution spanning 4.0-13.0 and current density from 50 to 260 mA cm(-2). Interestingly, strontium and barium apatite synthesis strongly depends on the stability of the saturated solution and the nature of the counter ion in solution. In addition, preliminary kinetic studies indicate a zero-order reaction. FTIR, X-ray diffraction, thermogravimetric analysis, and TEM studies are also reported.