They do not affect the menstrual cycle itself, however, they WILL affect your birth control (decreasing the effectiveness), which CAN effect your menstrual cycle. You can get pregnant or have changes in your menstrual cycle as if you had missed a week or so on your pills.
There are several situations when the menstrual cycle stops, and each situation causes different effects. The question would need to address whether it stopped as a result of pregnancy, menopause, athletic participation, illness, or any other circumstance.
He would wildly accelerate his car when the traffic light turned green. Gravity causes falling objects to accelerate as they move toward the Earth. Living in a foreign country can accelerate the speed at which you learn the native language.
You can accelerate your mastery of the language by doing all your vocabulary exercises. I tried to accelerate but my little four-cylinder engine was slow to comply. In order to accelerate construction, he brought in a larger crew. The ionized particles accelerated away from the emitter.