Irregular menstruation is when the length of the cycle is more than 35 days, or if the duration varies. A period, or menstruation, is the part of the menstrual cycle in which the endometrium, which is the lining of the uterus, is shed. This appears as bleeding from the womb that is released through the vagina.
1 There is no universally agreed symbol for the cubic foot/feet. 2  Various abbreviations are used, dependent on context, including (but not exclusively) cubic ft, cu ft, cb ft, cbf, ft3, foot3, feetÂ³, ftÂ³.  The cubic foot is used mainly in the United States, Canada and the United Kingdom as a measurement of volume.
A cubic foot (pl cubic feet) is a unit of measuring volume used by those countries who recognize the Imperial system and the US customary system (the US, the UK, a series of countries in African and the Pacific regions, etc.) A cubic foot is equal to the volume of a cube with each side of 0.3048 meter, or 1 foot.