How to determine a menstrual cycle
Nov 08, 2024
Source: Cainiu Health
Dr. Zhang Lu
Introduction
Under normal circumstances, a menstrual cycle is calculated as the time interval from the first day of one menstrual period to the first day of the next menstrual period. The calculation of the menstrual cycle starts on the first day of menstruation. If a woman with a previously regular menstrual cycle suddenly experiences changes in her cycle, or if her cycle becomes unusually long or short, especially when accompanied by other uncomfortable symptoms, she should seek medical attention at a hospital promptly.
Generally, a menstrual cycle is calculated as the time interval from the first day of one menstrual period to the first day of the next menstrual period. Detailed analysis is as follows:
The calculation of the menstrual cycle starts from the first day of menstruation and continues until the first day of the next menstruation. This period includes the menstrual phase, followed by the follicular phase and luteal phase. Generally, a menstrual cycle ranging from 21 to 35 days is considered within the normal range, with an average of 28 days. Due to individual differences, cycle lengths can vary significantly. The length of the menstrual cycle can be influenced by multiple factors, including genetic factors, hormone levels, lifestyle, and overall health status. A menstrual cycle that starts a week earlier or later than expected is still considered within the normal range.
If the menstrual cycle is shorter than 21 days, it is considered a shortened menstrual cycle or frequent menstruation, which may be caused by conditions such as uterine fibroids, polycystic ovary syndrome (PCOS), or premature ovarian insufficiency. If the menstrual cycle is longer than 35 days, it is considered a prolonged menstrual cycle or infrequent menstruation, which may be caused by conditions such as endometrial polyps, endometrial hyperplasia, or endometriosis.
Women should maintain good menstrual hygiene and avoid engaging in unprotected sexual activity during menstruation to reduce the risk of infection. Additionally, women should keep their abdomen warm and avoid consuming cold or raw foods during menstruation to help alleviate discomfort symptoms such as dysmenorrhea.
