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Obstetric hours

Obstetric hours – adaptation used for definition of date of childbirth and issue (prenatal and puerperal). Obstetric hours present themselves a calendar in the form of the circles or concentric rings rotating on the general axis on whom the corresponding divisions and designations are applied.

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Blood of the person "runs" on vessels under huge pressure and at disturbance of their integrity is capable to shoot of distance to 10 meters.