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.
Liter is a metric volume unit and equals to 0.035 cubic foot, 61 cubic inches, 1000 milliliters and 33.8 fl. ounces. The abbreviation is L. Cubic foot is an imperial and US customary volume unit and equals to 28.3 liters and 957.5 fl. ounces. The abbreviation is ft 3 .