Sleep Apnea and Fertility: Can Poor Sleep Affect Your Chances of Pregnancy?

What Is Sleep Apnea?

Sleep apnea is a sleep disorder in which breathing repeatedly stops and starts while sleeping. It mostly happens when the airways get blocked, or when the brain fails to send proper signals to control breathing.

When the breathing stops, the oxygen level drops and the body triggers a survival response. This slightly wakes the person to restore normal breathing. These repeated interruptions can occur many times while sleeping. As a result, the sleep cycle is disrupted, preventing sound sleep.

People suffering from sleep apnea can experience loud snoring, frequent awakenings, fatigue, and low energy. Untreated sleep apnea can take a toll on the heart and may increase the risk of serious health complications.

1. Types of Sleep Apnea

Sleep Apnea is categorised into three major types based on the causes of breathing interruptions while sleeping:

• Obstructive Sleep Apnea (OSA): This is the most common type of sleep apnea, and it occurs when the upper airways get partially or completely blocked while sleeping. This mostly happens when throat supporting muscles relax; it causes the tongue and soft palate to narrow or close the airway. Snoring, gasping in sleep, and excessive daytime drowsiness are some of its common symptoms.
• Central Sleep Apnea (CSA): Central sleep apnea happens when the brain temporarily fails to send the signals required to control breathing. It's not like OSA, where the airway is physically blocked. Here, the problem is in the body's breathing control system. Depending on the severity, doctors may recommend specialised positive airway pressure devices or some other therapies.
• Complex Sleep Apnea: This is also called treatment-emergent central sleep apnea. It happens when someone has features of both obstructive and central sleep apnea. In some cases, central sleep apnea becomes visible after treatment for obstructive sleep apnea starts.

2. Common Signs and Symptoms

Sleep apnea could cause symptoms both during the day and at nighttime; some of the common signs and symptoms are listed below:

• Loud snoring and gasping for air while sleeping
• Waking up suddenly with a sense of panic, or due to shortness of breath
• Difficulty in having sound sleep, with frequent awakenings
• Mouth dryness upon waking
• Feeling constantly sleepy and tired when awake
• Difficulty concentrating and staying focused
• Staying confused with reduced mental alertness

3. Who Is at Risk?

Sleep apnea could affect anyone, regardless of their age, gender, or body type. But some factors can make a person more likely to develop sleep apnea. A few such factors are mentioned below:

• In overweight people, the chances of having sleep apnea may increase because the extra fat around the neck can block the airways and make it worse while sleeping.
• The risk of sleep apnea also increases with age, especially obstructive sleep apnea.
• People with a large neck, enlarged tonsils, or a large tongue can make it difficult for air to pass through and can develop sleep apnea.
• Some who have a family history of sleep apnea are also at a higher risk of developing it. 
• Someone who is a frequent consumer of alcohol and smokes can also develop sleep apnea because the alcohol can relax the throat muscles, while smoking can cause swelling and irritation in the airway.
• Sleep apnea is commonly diagnosed in men; women can also develop sleep apnea during pregnancy or after menopause, but it's more frequent in men.
• People suffering from medical conditions like high blood pressure, heart diseases, stroke, and some neurological conditions are also at high risk of suffering from sleep apnea.
• Someone who is a long-term consumer of opioids is also at high risk of developing sleep apnea because the long-term consumption of opioids can interfere with the brain's control of breathing.

Can Sleep Apnea Affect Fertility?

Yes, Sleep apnea can affect fertility by disrupting sleep, reducing oxygen levels while sleeping, and interfering with normal hormone regulation. But having sleep apnea does not always mean that a person will have fertility problems. Researchers are still working to determine how strongly sleep apnea affects fertility.

Regular sleep disruption and drops in oxygen levels while sleeping can influence reproductive hormones and other processes involved in fertility. Some studies have found a link between Obstructive Sleep Apnea (OSA) and reproductive problems in both men and women. But other factors like obesity, metabolic disorders, and hormonal conditions can also contribute.

How Does Sleep Apnea Affect Female Fertility?

Sleep apnea may affect female fertility through hormonal, metabolic, and sleep-related changes. Sleep apnea is not considered a direct cause of infertility, but research states that sleep apnea may be relevant in women with conditions such as PCOS.

Sleep apnea can affect female fertility in the following ways:

• May be linked with PCOS: Obstructive sleep apnea is more common among women with polycystic ovary syndrome (PCOS). PCOS can interfere with ovulation and is also considered a major reason for infertility in women.
• May affect hormonal balance: Repeated sleep disruptions and reduced oxygen levels associated with sleep apnea may affect hormones and metabolic processes involved in reproductive function.
• May be linked to IVF outcomes: Some research suggests that sleep-disordered breathing may be associated with lower clinical pregnancy and live birth rates among women undergoing IVF/ICSI. But current evidence does not establish that sleep apnea and IVF are directly causing these outcomes.
• May coexist with menstrual and ovulation problems: Sleep apnea and conditions like PCOS can happen together. As a result, women experiencing irregular periods or difficulty ovulating can discuss sleep-related problems with their doctors for better results.

How Does Sleep Apnea Affect Male Fertility?

Sleep disorders and fertility in men can be related. It can affect male fertility by causing changes in testosterone, oxygen levels, sleep quality, and testicular function. As per some studies, from a fertility point of view, obstructive sleep apnea can change the quality of semen. Still, it is not confirmed that every man suffering from sleep apnea will become infertile.

Sleep apnea can affect male fertility in the following ways:

• May lower testosterone levels: Men suffering from obstructive sleep apnea may have lower testosterone levels, particularly when the condition is more severe.
• May affect sperm motility: Research has found that greater OSA severity is associated with poorer sperm movement.
• May affect semen quality: Some studies have found that men with OSA had lower sperm concentration compared with others without sleep apnea disorder. The semen parameter kept on worsening as OSA severity increased.
• Higher rates of sexual and erectile dysfunction: Men suffering from obstructive sleep apnea are more likely to experience erectile dysfunction and other forms of sexual dysfunction. This is because repeated sleep disruption, reduced oxygen levels, hormonal changes, and impaired blood vessel function can contribute to this problem.

Can Sleep Apnea Affect Pregnancy?

Yes, sleep apnea can affect pregnancy, and the condition may become worse as the pregnancy progresses. Some research has linked sleep apnea with several maternal and pregnancy complications like:

• Higher risk of high blood pressure: Sleep apnea in pregnancy is associated with a higher risk of gestational hypertension.
• Increased risk of preeclampsia: As per some studies, a link between sleep apnea and preeclampsia has been found. This is a pregnancy complication involving high blood pressure and potential organ problems.
• Higher risk of gestational diabetes: Women at the time of pregnancy suffering from sleep-disordered breathing are more likely to develop gestational diabetes.
• May increase the risk of preterm birth: Sleep apnea during pregnancy can increase the risk of preterm birth, where the baby can be born before 37 weeks.
• May increase the chances of C-section: Sleep apnea has also been related to a higher probability of cesarean delivery.

How Is Sleep Apnea Diagnosed?

Diagnosis of sleep apnea starts with doctors inquiring about the symptoms, sleep habits, and medical history. Sometimes observation of family members or partners becomes helpful, as they may notice loud snoring, pauses in breathing, or gasping during sleep.

After sleep apnea is suspected, the patients may be referred to sleep specialists or sleep centres for further evaluation. There, the specialist, based on the symptoms and type of sleep apnea, will determine which tests are required.

Tests to diagnose sleep apnea:

• Polysomnography (sleep study): This test is performed overnight at sleep centres. It monitors many body functions in sleep, like breathing patterns, heart rate, brain activity, oxygen levels in blood, and movements of arms and legs.
• Home sleep apnea test: In some cases, doctors may recommend a home sleep apnea test. These types of tests monitor factors like breathing patterns, airflow, heart rate, and blood oxygen levels. But sometimes home tests fail to detect sleep apnea; in such cases, polysomnography is recommended.

In case of obstructive sleep apnea (OSA), the patient can be referred to an ear, nose, and throat (ENT) specialist. This is to check whether there is any blockage or structural problem in the nose or throat that is affecting breathing. In case of central sleep apnea (CSA), the patient may be referred to a cardiologist or a neurologist to identify any underlying causes.

Can Treating Sleep Apnea Improve Fertility?

Yes, treating sleep apnea may support fertility by improving sleep quality, hormone balance, metabolic health, and sexual function. In men, untreated obstructive sleep apnea has been linked with lower testosterone and poor sperm quality. In women, sleep apnea may be associated with reproductive conditions like PCOS and poor fertility-treatment outcomes. But still more research is required to confirm that the treatment directly improves fertility.

Other Lifestyle Factors That Influence Fertility

Many lifestyle factors can affect fertility in both men and women. Some of them are listed below:

• Being overweight or underweight can affect reproductive hormones.
• Consumption of nutrient-rich foods can support overall reproductive health.
• Regular exercise and physical activity can benefit fertility.
• Sleeping soundly consistently supports hormonal balance.
• Managing chronic stress can support fertility and reproductive health.
• Avoid smoking, as it can negatively affect egg and sperm quality.
• Avoid alcohol consumption, because excessive alcohol consumption can reduce fertility.

When Should You Consult a Fertility Specialist?

A fertility specialist can help to identify factors affecting conception and recommend appropriate tests or treatments.

People should consult a fertility specialist in any of the following scenarios:

• Reproductive conditions: Women suffering from PCOS, endometriosis, or other conditions that may affect fertility.
• Male fertility concerns: Men suffering from problems with sperm, ejaculation, or testicular health.
• No pregnancy after 12 months: Women below 35 years of age, not able to conceive even after 12 months of regular unprotected intercourse.
• No pregnancy after 6 months: Women above 35 years of age, not being able to conceive even after 6 months of regular unprotected intercourse.
• Irregular periods: When women are having irregular or absent periods.
• Repeated pregnancy loss: Women experiencing repeated miscarriages.

Conclusion

Living with sleep apnea does not mean that pregnancy is not possible at all. Poor sleep and disrupted breathing may affect reproductive health, but early diagnosis and proper treatment can support better overall well-being. Paying attention to sleep, maintaining a healthy lifestyle, and getting medical help when required can help couples achieve their goal of starting a family.