Can Stress Cause Anovulation in Women?

What Is Anovulation?

Normally, the egg released during ovulation can be fertilised, resulting in pregnancy. In the case of anovulation, your ovaries do not release an egg. Despite this, some women may still experience menstrual bleeding, which makes it difficult to diagnose early anovulation. Also known as anovulatory cycles, anovulation is not uncommon.

This condition can affect many women, especially in adolescence and the years leading up to menopause. However, when anovulation becomes a frequent occurrence in the reproductive years, it can signal an underlying condition, including the effects of ongoing stress.

How Is Ovulation Normally Triggered?

For ovulation to occur normally, a carefully coordinated sequence of hormonal events occurs in the female body. The hypothalamus in the brain releases a hormone known as the gonadotropin-releasing hormone (GnRH), which then signals the pituitary gland to produce follicle-stimulating hormone (FSH) and luteinising hormone (LH).

FSH causes the follicles in the ovary to develop and mature. As the dominant follicle grows, it releases high levels of oestrogen, and when oestrogen reaches a sufficient level, it triggers a surge in LH, which causes the follicle to release the mature egg, resulting in ovulation.

Since the hormones are so intricately connected, the sequence depends on the proper timing and concentration of each. If any point in the cycle is disrupted, it can delay or completely prevent ovulation, leading to anovulatory cycles.

Can Stress Cause Anovulation?

Yes, there are chances that your anovulation could have been triggered by stress. The connection can be understood through the effects of stress hormones on the hypothalamic-pituitary-ovarian (HPO) axis, the hormonal system that controls ovulation.

When the body experiences stress, the hypothalamus releases corticotropin-releasing hormone (CRH), which signals the adrenal glands to produce more cortisol. Cortisol is the body’s primary stress hormone. While cortisol is being produced, the adrenal glands are also releasing adrenaline. Cortisol and adrenaline together prepare the body for immediate demands.

When stress becomes chronic, elevated cortisol can suppress GnRH production. Without enough GnRH in the body, the pituitary does not receive the proper signal to release FSH and LH. When LH production is disrupted or reduced, ovulation fails to take place.

What Happens In The Body When Stress Disrupts Ovulation?

The hormonal chain reaction consists of multiple interconnected systems:

• Cortisol suppresses GnRH: Cortisol affects the hypothalamus and decreases both the rate and intensity of pulsations of GnRH. Because GnRH needs to be released in a pulsatile manner for the pituitary to react normally, anything that disrupts the normal pattern of release might affect the production of FSH and LH.
• Elevated prolactin can interfere with the cycle: chronic stress can cause the elevation of another hormone called prolactin, which usually increases only when a woman gives birth. Increased prolactin levels will affect the pulsatile nature of GnRH secretion and prevent ovulation even in non-pregnant and non-lactating women.
• Adrenal glands produce androgens: The adrenal glands can increase the production of androgens such as DHEA-S under chronic stress. Androgens affect the follicles' growth and maturation.
• The body prioritises survival over reproduction: From a biological perspective, the stress response aims to increase a person's chances of survival. The ability to reproduce comes second in a stressful environment. Therefore, some suppression of reproduction is an adaptation mechanism. This can become problematic when stress is not short-lived.

Types Of Stress More Likely To Affect Ovulation

There are various kinds of stress that do not necessarily pose the same risks. Ovulation problems depend on how long they last, their intensity, and what causes the stress.

• Psychological stress (long-term): This kind of stress is generally associated with menstrual and ovulation irregularities. The prolonged elevation of cortisol in the body is more likely to suppress the HPO axis than a single, short-lived stressful episode. Chronic psychological stress can include workplace problems, relationship difficulties, grief, and more.
• Physical/Physiological stress: When a person’s body experiences sudden, significant weight loss, a very low body mass index, intense physical activity, and illness, considerable physical stress is induced, which affects reproductive function. This can be seen in athletes and women in highly restrictive calorie states.
• Emotional Trauma: Losing someone close to you, abuse, or big life changes may influence your menstrual periods and lead to anovulation.
• Lack of Sleep: It comes with its own problems. Along with stress, lack of sleep may make hormonal imbalances even more complex, since cortisol production is influenced by sleep deprivation.

How Long Can Stress-Related Anovulation Last?

This usually depends on the person. In some women, ovulation may resume fairly quickly once the source of stress has been removed. On the other hand, when stress is prolonged or severe, the hormonal axis may take longer to recover its normal rhythm.

It is also important to note that the relationship between stress and anovulation is not the same in every woman. Some women may be more reproductively sensitive to stress than others. Other factors like genetics, nutrition, and overall health can also influence how the HPO axis responds to stress.

What Are The Symptoms Of Anovulation?

Most of the time, early anovulation can be difficult to point out, especially if you are getting your periods regularly. However, it is important to be educated on the general signs of ovulation while simultaneously keeping track of your menstrual cycle.

Symptoms of anovulation can include:

• Irregular periods
• Very light or very heavy periods
• Amenorrhea, or the complete absence of periods
• Absence of egg white cervical mucus right before and during ovulation
• Irregular basal body temperature
• Difficulty conceiving despite trying

How Doctors Diagnose Anovulation?

Once alarm bells ring in your head and you reach out for medical help, the doctor will begin by having a detailed discussion about your menstrual history, symptoms, and notable changes in lifestyle or anything that has been causing you stress.

• The doctor will tell you to keep a track of your basal body temperature, noting it down each morning before getting out of bed.
• The urine test for predicting ovulation by measuring LH concentrations is another method that could be adopted.
• Measurement of progesterone levels using a blood test is recommended to be done seven days post the estimated day of ovulation. If the level of progesterone is very high, it is evidence that ovulation has taken place. However, if the level of progesterone is low, ovulation has probably not happened.
• Transvaginal ultrasonography can be conducted in a cycle to measure the development of follicles and whether or not there has been a rupture of the follicle with the release of the egg.
• The use of hormonal tests, such as follicle-stimulating hormone, luteinising hormone, oestrogen, prolactin, thyroid functions, and androgens, will be helpful in determining the cause of anovulation.

Treatment and Lifestyle Changes to Restore Ovulation

There are several options available for the treatment of anovulation. These options include:

• Medications for other disorders: If anovulation is associated with a different disorder that can be treated with medication, then the use of such medications will help in the restoration of ovulation.
• Clomiphene citrate: CC is considered an effective option for the treatment of anovulation under medical supervision.
• Letrozole: Sometimes, letrozole may be recommended for inducing ovulation. However, it must be highlighted that letrozole is commonly used off-label for ovulation induction and may be recommended in certain cases.
• Injections: Human chorionic gonadotropin (HCG), FSH, and GnRH agonist and antagonist injections can be used to treat anovulation under medical supervision.

Other than these therapies, one may also consider modifying their life choices in order to regulate ovulation, such as:

• Handling stress levels: Given the fact that stress is known to be one of the causes of anovulatory periods, handling stress using various methods such as CBT, meditation, and counselling may help one achieve normal ovulation.
• Nutrition and body weight: It is also important for a woman to maintain a healthy body weight and take a nutritious diet for optimum reproductive health.
• Exercises: It is important to do moderate exercises for women whose extreme physical activity is leading to disruption. Rather than ceasing exercise, emphasis should be laid on lightening the load.
• Sleep and caffeine: Prioritising your sleep can help normalise the cortisol levels in your body and help support the hormonal environment needed for ovulation. Also, reduce stimulants like caffeine, which can cause an increase in cortisol.

Women who have been noticing a complete absence of periods, irregular periods, and heavy or light periods and are experiencing difficulties in conceiving, should meet with a doctor to find the best solution to the problem. While lifestyle changes can drastically improve the condition, it is also beneficial to have a doctor’s professional opinion.

Conclusion

Stress can cause anovulation through a well-understood hormonal mechanism involving GnRH suppression, LH and FSH disruption, and more. Both psychological and physical stress can contribute to the occurrence of anovulatory cycles, especially when stress is experienced over a long period.

A woman who experiences irregular menstrual periods, or even lack of them altogether, when under stress may very well be experiencing anovulation but not know it. It is crucial to know how to spot the symptoms and undergo medical evaluation, especially when they are actively attempting pregnancy.

Often, when the stressor is identified and addressed, along with lifestyle changes, the hormone imbalance may normalise itself, and ovulation may occur again. But, as mentioned above, anovulation may be caused by other factors such as PCOS, hyperthyroidism, and high prolactin levels, among others.