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The phenomenon of not ovulating during the menstrual cycle occurs quite commonly in adolescent girls, premenopausal women or people with medical conditions. Causes may be due to endocrine abnormalities, ovarian or due to physical damage in the hypothalamus-pituitary gland.
1. Why is there no ovulation?
Ovulation is a normal occurrence in a woman's body. Ovulation usually occurs in the middle of the menstrual cycle, which is around day 14 of the menstrual cycle.
Women from 13-14 years old and above, the ovaries have fully developed and started to ovulate, usually 1 mature egg is released every month in the ovary. A menstrual cycle without ovulation is also known as an anovulatory cycle. During this menstrual cycle, the ovaries do not have mature follicles, so ovulation does not occur as usual. Anovulatory cycle is quite uncommon in healthy women, it often occurs in premenopausal women, adolescent girls, women after miscarriage, childbirth or subjects with medical conditions. abnormal.
Trắc nghiệm: Bạn có hiểu đúng về dấu hiệu mang thai sớm?
Các dấu hiệu mang thai sớm không phải chỉ mỗi trễ kinh mà còn có rất nhiều dấu hiệu khác như xuất huyết âm đạo, ngực căng tức,… Điểm xem bạn biết được bao nhiêu dấu hiệu mang thai sớm thông qua bài trắc nghiệm này nhé!
Normally, hypothalamus will secrete Gn-RH, stimulating pituitary gland to secrete LH, FSH. LH and FSH will stimulate the follicle to mature and release an egg, thereby causing menstruation. But due to a number of reasons, causing the above process to be affected leading to the menstrual cycle not ovulating. Some common causes include:
Because the hypothalamus-pituitary gland does not secrete enough stimulating hormone for the ovaries (common in adolescents). Due to decreased ovarian sensitivity to hormones secreted by the hypothalamus-pituitary gland (common in premenopausal women). Due to disease or physical damage such as damage to the hypothalamus-pituitary gland that impairs hormone secretion function, polycystic ovary disease. Due to the use of drugs: Current oral contraceptives have the effect of inhibiting ovulation, causing amenorrhea.
Các loại thuốc tránh thai hiện nay có tác dụng ức chế hiện tượng phóng noãn, gây mất kinh
2. Signs of a non-ovulatory cycle
To accurately determine whether a menstrual cycle is ovulating or not, specific tests are needed. However, you can still identify an anovulatory cycle based on some of the following characteristics:
The cycle of anovulatory cycles is usually shorter than normal menstrual cycles, about 23-25 day. This phenomenon is because there is no ovulation, so there is no formation and activity of the corpus luteum, so in terms of hormones, the menstrual cycle will be shortened later.
Chu kỳ của vòng kinh không phóng noãn thường ngắn ngày hơn các chu kỳ kinh nguyệt bình thường, khoảng 23-25 ngày
The body temperature of a woman with an anovulatory cycle is also slightly different. Normally, a few days before menstruation, a woman's body temperature rises. The phenomenon of increased body temperature in the second half of the menstrual cycle due to the effect of luteal hormones secreted. However, with careful monitoring of temperature at regular intervals, it is found that in non-ovulatory cycles, basal body temperature will not rise. A sign of an anovulatory cycle is the absence of dysmenorrhea (pain during menstruation). So, if in previous periods, you often had period pain, but this time there was no pain or only very mild pain, this period may not have an ovulation phenomenon. Currently, Vinmec has a basic gynecological screening package, which helps to detect the disease even when there are no symptoms and treat problems of dysmenorrhea and menstrual disorders according to the regimen that is most suitable for the condition of the disease. to achieve the best outcome for the patient's health.
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