11.   And the consequences can be unintended pregnancies for women and girls who happen to be at or near the middle of their menstrual cycles.

12.   And women who live together, he noted, often find that their menstrual cycles become synchronized over time.

13.   Answers to questions on inconsistent menstrual cycles, estrogen-replacement therapy and how to deal with endometriosis pain.

14.   Apparently all of this running, on top of wearing on tendon and bone, has been known to challenge the immune system and interfere with the menstrual cycle.

15.   Aylon has created an installation that charts her menstrual cycle through the decade of her marriage to an Orthodox rabbi, highlighting the times when she was considered impure.

16.   Birth-control pills that contain high levels of progesterone, which regulates the menstrual cycle, can depress desire and cause moodiness.

17.   Blaming variations in performance on the menstrual cycle is unfair.

18.   A sign of HIV infection in women, for instance, can be irregular menstrual cycles, symptoms that mimic pregnancy and recurring vaginal infections.

19.   Across the country, government clinics routinely offer it as an alternative to surgery for women looking for abortions within seven weeks of their last menstrual cycle.

20.   But he said he assumed that topical estrogen would increase the thickness of vaginal cells at any given time in the menstrual cycle.