Could pollution and sleep habits be messing with your hormones? new study investigates.
NCT ID NCT06280807
First seen Jun 24, 2026 · Last updated Sep 10, 2026 · Updated 4 times
Summary
This study looks at how things in your environment—like pollution, chemicals, diet, and sleep—might affect your hormones and reproductive health. Researchers will follow 300 people aged 8 and older who have conditions like low or high hormone levels, early or late puberty, or infertility. Participants will have regular checkups, blood and urine tests, and answer questions about their lifestyle to help uncover links between environment and hormone problems.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 300 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2024
- Expected to finish
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Mar 2039
An estimate. End dates often move.
- Lead sponsor
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A government research agency
The lead sponsor is the US National Institutes of Health.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
Adult and pediatric (between the ages of 8 and 18), cisgender male and females, from the communities and surrounding areas of Durham, Chapel Hill and Raleigh in NC; and Bethesda, MD.
- Ages
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8 to 99 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
* INCLUSION CRITERIA: In order to be eligible to participate in this study, an individual must meet all of the following criteria: 1. Male or female, referring to sex assigned at birth (cis gender) 2. Age \> 8 years and weight \>= 12 kg 3. A diagnosis of hypogonadism, infertility or other reproductive dysfunction Some specific diagnoses (as defined in standard guidelines) will include: * Male or female hypogonadism * Obesity/metabolic syndrome related to hypogonadism. * Other reproductive dysfunction (e.g., secondary to endocrine dysfunction, thyroid disorders, Cushing syndrome, pharmacotherapy, etc.) * Premature Ovarian Insufficiency * Isolated hypogonadotropic hypogonadism * Polycystic Ovarian Syndrome * Delayed Puberty * Precocious puberty * Perimenopause and post-menopausal states * Androgen Excess States (Nonclassic Congenital Adrenal Hyperplasia, Extreme hyperinsulism, Idiopathic etc.) or -Exhibiting signs of a diagnosis of hypogonadism, e.g., Bosma arrhinia microphthalmia syndrome (BAMS) 4. Ability of participant, legal guardian, or Legally Authorized Representative (LAR) to understand and the willingness to sign a written informed consent document. EXCLUSION CRITERIA: An individual who meets any of the following criteria will be excluded from participation in this study: 1. A diagnosis of a serious medical disorder such as malignancy or heart disease will be grounds for exclusion at the discretion of the PI or AI. 2. Inability to follow up with the research study and/or perform study procedures, at the discretion of the PI or AI. 3. Pregnant participants, less than 18 years of age, for their safety, since there is not a trained doctor on the study to give proper medical care to pregnant individuals less than 18 years of age. Individuals who do not meet the criteria for participation in this study (screen failure) because of an acute, reversible or transient medical reason may be rescreened upon reversal, improvement or stabilization of their clinical status. Participants who develop an acute, reversible or transient medical condition during the study may return upon reversal, improvement or stabilization of their clinical status.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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NIEHS Clinical Research Unit (CRU)
RECRUITINGResearch Triangle Park, North Carolina, 27709, United States
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