During which days does menstruation typically take place?

Menstruation typically takes place during the first five days of the menstrual cycle, which is classified as Days 1 to 5. This phase marks the shedding of the uterine lining, which occurs if an egg is not fertilized after ovulation. The cycle begins with the first day of menstrual bleeding, indicating a new cycle of hormonal changes and preparations for possible conception.

The other options reflect different phases of the menstrual cycle. Days 6 to 10 generally correspond to the follicular phase, where the follicles in the ovaries mature, leading to ovulation. Days 11 to 15 are usually around the time of ovulation, when an egg is released, and Days 16 to 20 fall within the luteal phase, where preparation for a potential pregnancy occurs. Thus, it is during Days 1 to 5 that menstruation specifically takes place.