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.
The cubic inch is a unit of measurement for volume in the Imperial units and United States customary units systems. It is the volume of a cube with each of its three dimensions being one inch long. The cubic inch and the cubic foot are still used as units of volume in the United States, although the common SI units of volume, the liter, milliliter, and cubic meter, are also used, especially in manufacturing and high technology. One cubic foot is equal to exactly 1,728 cubic inches because 123 = 1,728.