Infertility and Fertility Decline

Women inevitably reach a point when they can no longer become pregnant; however, the age at which fertility starts to decline varies [1]. At peak fertility, recurrent intercourse results in about 52% pregnancy success in females aged 19–26 and 30% in females aged 35–39. The probability of getting pregnant from a single act of intercourse at peak fertility is about 9%.

Male fertility also declines with age—semen parameters generally begin decreasing around age 35 and drop further after age 50. Pregnancy success usually peaks within the first few months of trying, and 80% of couples conceive within six months.

Causes of Infertility

In the US, about 15% of couples experience infertility with no identifiable cause. Ovulatory disorders account for around 25% of infertility diagnoses [2]. Doctors often suspect anovulation when cycles are irregular (less than 21 days or longer than 35 days), menstruation is absent, or abnormal uterine bleeding occurs [2].

Polycystic ovarian syndrome (PCOS) causes anovulation in 70% of affected women. Other causes include obesity, thyroid disease (2–3%), pituitary disease (13%), high androgen levels (2%), low body weight, and eating disorders.

Additional infertility causes include tubal occlusion, endometriosis, low ovarian reserves, uterine factors, and male factors. Male factors contribute to infertility in about one in three couples [2] and may involve low testosterone, low sperm count, or obstruction [2, 3].

Lifestyle and Environmental Influences

Lifestyle factors such as weight, diet, and tobacco use can affect fertility [1, 2]. Male consumption of alcohol, caffeine, and red meat correlates negatively with pregnancy rates [2]. Environmental toxins and pollutants reduce fertility in both sexes [1].

Infertility also links to higher cancer risk in both men and women, although researchers have found no connection between cancer and fertility treatments.

Mental Health and Infertility

People, especially women, who face infertility often experience higher rates of depression and anxiety [4]. Studies show that 30–76% of women with fertility challenges report depression, anxiety, or both. The link between stress and fertility remains unclear, partly due to inconsistent and inaccurate self-reports.

Fertility drugs can trigger psychological symptoms, and failed treatment attempts often intensify depression and anxiety—effects that worsen with repeated failures. Psychological stress can discourage women from starting or continuing fertility treatments.

Limitations of Current Mental Health Treatments

Drugs used to treat depression and anxiety carry warnings for people trying to conceive because they may reduce fertility in both sexes [5–10]. Some studies suggest antidepressant use during pregnancy can harm fetal development and increase the risk of miscarriage and preterm labor [11].

The 1977 FDA guidelines restricted most women of reproductive age from participating in clinical studies, limiting research in this area. Only after the 1993 NIH Revitalization Act did researchers actively include women in clinical research. More studies are needed to fully understand how these medications and mental health conditions affect fertility outcomes.

Potential Role of Psychedelics

Psychedelics can reduce stress markers and immune responses [12] and alleviate depression and anxiety [13, 14] by promoting psychological insight and reducing experiential avoidance [15]. This process can help individuals cope with infertility and its emotional challenges.

Key questions arise:

• Could psychedelic treatment before infertility treatment improve success rates?

• Could it reduce the need for fertility treatments altogether?

• Could psychedelic therapy after treatment help couples cope with unsuccessful outcomes?

Single psychedelic sessions can produce lasting improvements in depression and anxiety [16] without daily medication, potentially offering a safer option for those wishing to conceive. Beyond mental health, psychedelics may also influence physiological processes.

Psychedelics and Physiology

Blood Flow: Some studies suggest psychedelics may influence cerebral blood flow [18], but evidence on systemic effects—especially on reproductive tissue—remains inconclusive. Researchers need more data in this area.

Drug Persistence in the Body:

• Psilocybin, LSD, and ketamine become undetectable in plasma 24 hours after dosing [17, 19, 20].

• MDMA has a plasma half-life of roughly 6–8 hours [21].

While scientists have documented the pharmacokinetics of these substances and their metabolites, they still need to explore potential biological effects of the metabolites.

A review found no link between LSD and chromosomal abnormalities, though its effects on fetal development remain uncertain [22].

Conclusion

Infertility and its psychological toll create a complex challenge. Current treatments often force people to choose between fertility interventions and mental health care. Psychedelics may offer a unique solution—improving mental health before starting fertility treatments, potentially increasing success rates, and helping couples cope with unsuccessful outcomes.