Duration of copyright: Works created but not published or copyrighted before January 1, 1978. (a) Copyright in a work created before January 1, 1978, but not theretofore in the public domain or copyrighted, subsists from January 1, 1978, and endures for the term provided by section 302.n no case, however, shall the term of copyright in such a work expire before December 31, 2002; and, if the work is published on or before December 31, 2002, the term of copyright shall not expire before December 31, 2047.
Menstrual cycle. Home Â» Menstrual cycle. Definition. noun. The reproductive cycle of human and other animal (e.g. certain primates) females, and is comprised of phases characterized by the changes in the ovarian follicles (i.e. ovarian cycle), as well as changes in the endometrial lining of the uterus (i.e. uterine cycle) Supplement.
Phases of the menstrual cycle. The menstrual cycle has four distinct phases: menstruation, the follicular phase, ovulation, and the luteal phase. Although menstruation is considered to be the first phase of the cycle, in order to properly understand menstruation, it is necessary to first explain the other phases.