What describes the menstrual cycle?

The menstrual cycle is best described as a monthly cycle involving ovulation and uterine preparation. This cycle typically lasts about 28 days, although it can vary among individuals. It encompasses several key phases: the menstrual phase, where the uterine lining is shed if no pregnancy occurs; the follicular phase, where follicles in the ovaries mature; ovulation, which is the release of an egg; and the luteal phase, where the uterus prepares for a potential pregnancy.

During ovulation, a mature egg is released from the ovary and travels down the fallopian tube, where it can be fertilized by sperm. Concurrently, the uterine lining thickens in anticipation of possible implantation if fertilization occurs. If the egg is not fertilized, hormone levels drop, leading to the shedding of the uterine lining in the next menstrual period.

The other options do not accurately encapsulate the menstrual cycle's processes and time frame. A daily cycle of hormone secretion does not reflect the longer, more complex nature of the menstrual cycle. A yearly cycle of egg production overlooks the more frequent events within the cycle. A continuous cycle of sexual reproduction inaccurately implies that the processes occurs without the defined phases characteristic of the menstrual cycle.