Ovulation is the stage of the menstrual cycle when a fertilizable egg is released from the ovarian follicle.
A temporary gland of internal secretion, called the corpus luteum, forms at the site of the ovulated follicle. This gland is responsible for the secretion of progesterone, one of the most important female sex hormones. Progesterone regulates the state of the endometrium, preparing it for embryo implantation.
The lifespan of a mature egg is short, only 12-24 hours from the start of ovulation. If fertilization does not occur, the egg dies, and the corpus luteum gradually ceases to function. Changes in the endometrium lead to menstrual bleeding.
Ovulation is an integral part of the functioning of a woman’s reproductive system. The condition where ovulation is absent is called anovulation, which is the process where the egg does not mature or is not released from the follicle. When the secretory phase does not follow the proliferative phase, it can lead to disruptions in the menstrual cycle duration (less than 24 days or more than 38 days), changes in the volume of menstrual discharge (resulting in heavy bleeding or scanty discharge), or complete absence of menstruation. An anovulatory cycle causes further imbalances in the endocrine system and can have several negative consequences:
- Problems with conceiving, infertility
- Formation of ovarian cysts
- Endometrial hyperplasia, increased risk of endometrial cancer
- Changes in the mammary glands
- Pathological uterine bleeding
Additionally, the absence of ovulation can lead to psycho-emotional disturbances, reduced productivity, and impaired concentration and memory.
Causes of Anovulation
There can be many reasons for the absence of ovulation. For example, ovulation may be absent in women who are constantly under stress, follow a strict diet, or engage in intensive physical exercise. Anovulation is often a consequence of hypothyroidism (thyroid dysfunction), hyperprolactinemia, excess androgens (especially in the context of PCOS), and premature ovarian failure. Less commonly, the cause can be anatomical changes in the hypothalamic-pituitary complex (pituitary tumors, empty sella syndrome, head injuries, pituitary aneurysm, etc.) or the use of certain medications (antipsychotic drugs, opiates).
Hormonal Disorders
Hormonal changes are one of the most common causes of the absence of ovulation and occur due to dysfunction of an organ or the presence of a hormone-producing tumor. For example, excessive secretion of prolactin due to the presence of a prolactinoma (pituitary tumor), excessive secretion of androgens in PCOS or adrenal diseases, and decreased secretion of thyroid hormones, which often occurs against the background of autoimmune thyroid disease. When it comes to premature ovarian failure, it is often due to a genetic defect, provided the woman has not undergone ovarian surgery.
General Physiological Factors
Significant deviations from normal body weight are a common cause of anovulation in women of reproductive age. Since adipose tissue accumulates hormones that affect ovulation, excessive weight gain, sudden weight loss, or fluctuations in weight can trigger disruptions in ovulatory function.
Stress and Emotional Imbalance
Acute and chronic stress, excessive physical and psychological stress, overwork, and lack of sleep can also lead to disruptions. When these conditions are corrected, the function of the reproductive system often normalizes.
Premature Menopause
Premature menopause can occur for several reasons: autoimmune diseases, congenital genetic abnormalities, viral infections, surgical removal of reproductive organs, and toxic damage.
Other factors that can provoke ovulation disorders include:
- Radiation exposure
- Past infectious diseases
- Cytostatic treatment for cancer
- The use of certain medications
Anovulation is not an independent disease but a symptom of pathological disorders in the body of a woman of reproductive age. This condition requires diagnosis and correction, and necessarily the treatment of the underlying disease that caused it.
Are There Symptoms Indicating the Absence of Ovulation?
The disruption of the ovulation process is not always accompanied by the absence of menstruation. Possible symptoms of an anovulatory cycle include:
- Atypical Menstrual Patterns: Women may experience amenorrhea (complete absence of menstruation), oligomenorrhea (infrequent menstruation), or heavy uterine bleeding.
- Monophasic Basal Temperature Chart: During ovulation, basal temperature rises in the middle of the cycle; without ovulation, this rise does not occur.
- Stable Discharge: Mid-cycle vaginal discharge typically becomes thicker (similar to egg whites); in women with anovulation, it remains unchanged.
- Unchanged Breast Condition: The breasts do not swell or become more sensitive.
Diagnosing the Absence of Ovulation
Professional instrumental methods and home diagnostic tools are used to determine the ovulation process.
- Folliculometry: This ultrasound examination tracks follicle growth, the occurrence of ovulation, or its absence. A gynecologist schedules several studies during one cycle. The advantage of this method is its high accuracy. Additionally, such ultrasound diagnostics can detect pathologies in the reproductive system.
- Ovulation Tests: These work similarly to pregnancy test strips but react to luteinizing hormone. Positive results appear 24-48 hours before ovulation.
- Basal Temperature Charting: This method of monitoring ovulation is becoming less common due to its lower reliability.
- Progesterone Analysis: A fairly accurate auxiliary method for controlling ovulation. Progesterone levels increase several times during this period.
- Ovarian Reserve Assessment: This evaluates the reserve of eggs. This indicator is individual for each woman from birth.
Treatment of Anovulation – Methods and Approaches
Anovulation is not an independent disease, so the treatment plan is determined after identifying the cause and is adjusted individually.
In various situations, women receive specific recommendations:
- Hormonal therapy in case of hormonal disorders;
- Correction of deficiencies by prescribing vitamins and minerals;
- Dietary adjustments and weight normalization;
- Normalization of sleep and rest, stress management measures, physical activity;
- Working with a psychotherapist;
- In certain cases, surgical treatment may be recommended (removal of a hormone-producing tumor).
What to Do When Ovulation Does Not Resume After Treatment
If ovulation does not resume and the woman plans to conceive, the doctor may recommend induction. The entire process of follicle growth, maturation, and rupture is induced and controlled by hormonal medication. In other words, the ovulation process is stimulated artificially. Hormonal medications are chosen based on individual characteristics such as age, ovarian reserve, etc. Often, as a result of ovulation induction, two or three eggs mature simultaneously.
Prevention and Support of Ovulatory Function
The most important preventive measures for preventing disruptions in ovulatory function include:
- Maintaining a normal body mass index, avoiding mono-diets, fasting, unhealthy weight loss through medication, etc.;
- Stabilizing the psycho-emotional state—avoiding stress and anxiety, preventing overwork;
- Balanced nutrition and normalization of sleep;
- Monitoring health, timely visits to a gynecologist, endocrinologist, and therapist.
Conclusions
Anovulation is a problem that requires specialist supervision. This condition indicates pathological processes in a woman’s body that need to be diagnosed and treated, taking into account age and physical condition. A comprehensive approach to anovulation enables a woman to conceive during her reproductive years and restore the health of her reproductive and endocrine systems.