How do you calculate the ouvaltion period?

How can you get relief from a urinary tract infection? What is seronegative rheumatoid arthritis? Is there low sugar in eggs? How do you replace an alternator 1990 F-150 4.9? What is stocktaking? Does a person get hit at 300k by an airbag breaking sternum? Should you wash your hair with conditioner before colouring it? What does a rectum do in a grasshopper? May you walk in good health and happiness? Will you have diabetes forever? The meaning of symptoms? What is the bloody show while having a baby? Is it normal to see pink when you wipe during pregnancy and is this considered spotting? Can a premature baby breath on its own by 17 weeks? What would cause itchy res sores on bottom that have welts? What age does blindness mostly start? Tired dizzy and feel sick? When you lay down and look up you get dizzy what causes that? What diseases begin with A? Males are more likely to be colorblind than females because?