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.
Menstruation is the shedding of the lining of the uterus (endometrium) accompanied by bleeding. It occurs in approximately monthly cycles throughout a woman's reproductive life, except during pregnancy. Menstruation starts during puberty (at menarche) and stops permanently at menopause (see Menopause). By definition, the menstrual cycle begins with the first day of bleeding, which is counted as day 1. The cycle ends just before the next menstrual period. Menstrual cycles normally range from about 25 to 36 days.