<P> Studies investigating effects of the menstrual cycle on alcohol consumption have found mixed evidence . However, some evidence suggests that individuals consume more alcohol during the luteal stage, especially if these individuals are heavy drinkers or have a family history of alcohol abuse . </P> <P> The level of substance abuse increases with PMS, mostly with addictive substances such as nicotine, tobacco and cocaine . One theory behind this suggests this higher level of substance abuse is due to decreased self - control as a result of the higher metabolic demands during the luteal phase . </P> <P> Infrequent or irregular ovulation is called oligoovulation . The absence of ovulation is called anovulation . Normal menstrual flow can occur without ovulation preceding it: an anovulatory cycle . In some cycles, follicular development may start but not be completed; nevertheless, estrogens will be formed and stimulate the uterine lining . Anovulatory flow resulting from a very thick endometrium caused by prolonged, continued high estrogen levels is called estrogen breakthrough bleeding . Anovulatory bleeding triggered by a sudden drop in estrogen levels is called withdrawal bleeding . Anovulatory cycles commonly occur before menopause (perimenopause) and in women with polycystic ovary syndrome . </P> <P> Very little flow (less than 10 ml) is called hypomenorrhea . Regular cycles with intervals of 21 days or fewer are polymenorrhea; frequent but irregular menstruation is known as metrorrhagia . Sudden heavy flows or amounts greater than 80 ml are termed menorrhagia . Heavy menstruation that occurs frequently and irregularly is menometrorrhagia . The term for cycles with intervals exceeding 35 days is oligomenorrhea . Amenorrhea refers to more than three to six months without menses (while not being pregnant) during a woman's reproductive years . </P>

What is the order of events in one uterine cycle