Erythrocyte-Diameter and Menstruation

Woman, moon and menstruation.

“The pituitary has an intrinsic rhythm of small amplitude with a frequency of every two to ten minutes. Superimposed on this intrinsic rhythm is a rhythm caused by the pulsatile release of hypophysiotropic releasing factors, with or without the withdrawal of a corresponding inhibitory factor. Rhythms that are shorter than a day are referred to as ultradian rhythms. The next layer of rhythmicity...

Menstruation does not cause anemia: endometrial thickness correlates positively with erythrocyte count and hemoglobin concentration in premenopausal women.

Menstruation has often been cited as a risk factor for iron-deficiency anemia. This study tested whether normal, premenopausal women's luteal endometrial thickness (ET) was associated with their red blood cell count (RBC) and hemoglobin concentrations (Hg), and therefore whether a high ET put women at risk for anemia. Endometrial thickness can be considered a reasonable proxy for menstrual bloo...

Case of Vicarious Menstruation

Hormones in Menstruation and Pregnancy

Letter: Menstruation and violent behavior.