polyhypomenorrhea

pol·y·hy·po·men·or·rhe·a

(pol'ē-hī'pō-men'ō-rē'ă),
Frequent but scanty menstruation.
[poly- + G. hypo, below, + mēn, month, + rhoia, a flow]

polyhypomenorrhea

(pŏl″ē-hī″pō-mĕn″ō-rē′ă) [″ + hypo, under, + men, month, + rhoia, flow]
Frequent menstruation with scanty discharge.