What is the most accurate due date calculator in people's experience ? I have compared a number, many of which give different answers. One of the ones I liked the best is at www.redbabybook.com as it gives a range of dates and probabilities. It claims to use sophisticated algorithms, but do others think this is more accurate ? Makes quite a difference for me as my last baby had growth delay which would have been picked up earlier if I'd had an accurate mismatch between my LMP predicted and ultrasound predicted dates. Thanks Emily
