menostasis

from The Century Dictionary.

• noun In pathology, the retention of the menses and their accumulation in the uterus; suppression or retention of the catamenial discharge.
• noun The acute pain which in some women precedes each appearance of the menses: so called because it is presumed to be occasioned by stagnancy of the blood in the capillary vessels of the uterus.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Med.) Stoppage of the menses.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun medicine stoppage of the menses