- | ICD9 = | }} Amenorrhoea (BE), amenorrhea (AmE), or amenorrhœa,'s the absence of a menstrual period in a woman of reproductive age. Physiological states of amenorrhoea are seen during pregnancy and lactation (breastfeeding), the latter also forming the basis of a form of contraception known as the lactational amenorrhea method. Outside of the reproductive years there's absence of menses during childhood and after menopause. Amenorrhoea's a symptom with many potential causes. Primary amen… (More on Amenorrhea)