| http://www.w3.org/ns/prov#value | - It does seem expensive though!Have you read Taking Charge of your Fertility by Toni Weschler?http://www.amazon.co.uk/Taking-Charge-Your-Fertility-Reproductive/dp/0091887585It describes how women can learn to recognise whereabouts they are in their cycle and whether they are fertile or not- by taking your temperature and monitoring cervical fluid/ cervix position etc.
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