The medical term used to refer to an extremely light blood flow or short duration of menstruation
Menstruation is the recurring discharge of blood, cervical mucus, vaginal secretions, and endometrial tissue of a nonpregnant females of humans and other animals (e.g. certain primates, shrews, and bats.1 There are instances though when menstrual period is different from the norm. Hypermenorrhoea, for one, pertains to the extremely heavy or prolonged periods of menstrual flow. In contrast, hypomenorrhoea is a menstrual period disorder wherein blood flow is light or the duration of menstruation is shorter than the normal. In humans, bleeding lasts to an average of five days and the total blood flow is between 25 and 80 mL (i.e. soaking a pad or tampon every two hours or less).2
Asherman's syndrome, a condition characterized by adhesions and/or fibrosis of the endometrium, cause hypomenorrhoea and the degree of hypomenorrhoea is correlated to the extent of adhesions.3 Other factors leading to hypomenorrhoea include smaller uterine, psychogenic factors (e.g. stress, excessive excitement, etc.) and diminished body fat.
- hypomenorrhea (US spelling)
1 Lopez, K. H. (2013). Human Reproductive Biology. Academic Press. p. 53.
2 Munro, M. G., Critchley, H. O. D., Broder, M. S., and Fraser, I. S. (2011-04-01). "FIGO classification system (PALM-COEIN) for causes of abnormal uterine bleeding in nongravid women of reproductive age". International Journal of Gynaecology and Obstetrics: The Official Organ of the International Federation of Gynaecology and Obstetrics 113 (1): 3–13.
3 Toaff, R., Ballas, S. (1978). "Traumatic hypomenorrhea-amenorrhea (Asherman's syndrome)". Fertil. Steril. 30 (4): 379–87.