Online pregnancy dating calculator, with graphic pregnancy wheel. Similar to many online calculators, but designed to look like an existing iPhone pregnancy app. Click on a parameter (ie last menstrual period) and other parameters calculated automatically and displayed. I will supply detailed mathematical reasoning and calculations. This is currently in a flash format, but we need to move away from flash to HTML5 or another more modern version that will run on iPad/iPhone safari etc. Similar to online booking calendar, ie click date and popup calendar appears which can be selected. Also, once pregnancy due date established, a graphical pregnancy wheel, customized for current data) will appear (classical pregnancy wheel with months on outside and weeks/other info inside - google pregnancy wheel for example), which can be saved printed as a PDF.