Evidence map›Paper›PMID 34388609›Full record

ArticleInternational journal of hygiene and environmental health2021

Hair mercury levels, intake of omega-3 fatty acids and ovarian reserve among women attending a fertility center.

Lidia Mínguez-Alarcón, Paige L Williams, Irene Souter, Caitlin Sacha, Chitra J Amarasiriwardena, Jennifer B Ford, Russ Hauser, Jorge E Chavarro, Earth Study Team

Open access · greenAbstract read
In one paragraph

Article in International journal of hygiene and environmental health, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
0.7field-weighted citation impact, top 32% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Observational
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Lidia Mínguez-AlarcónChanning Division of Network Medicine, Harvard Medical School & Brigham and Women's Hospital, USA; Departments of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA. Electronic address: lminguez@hsph.harvard.edu.
Paige L WilliamsDepartments of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA; Departments of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, USA.
Irene SouterVincent Obstetrics and Gynecology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Caitlin SachaVincent Obstetrics and Gynecology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
Chitra J AmarasiriwardenaDepartment of Preventive Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
Jennifer B FordDepartments of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA.
Russ HauserDepartments of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, USA; Departments of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA; Department of Obstetrics, Gynecology and Reproductive Biology, Massachusetts General Hospital, Harvard Medical School, Boston, USA.
Jorge E ChavarroChanning Division of Network Medicine, Harvard Medical School & Brigham and Women's Hospital, USA; Departments of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, USA; Departments of Nutrition, Harvard T.H. Chan School of Public Health, Boston, USA.
Earth Study Team
Harvard University · USBrigham and Women's Hospital · USIcahn School of Medicine at Mount Sinai · USMassachusetts General Hospital · US

Funding

Translational Research Support CoreP30ES000002 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI JAIME ELIZABETH HART · 1985 to 2026
$44.6M
ROLE OF DIETARY CONSTITUENTS ON GENE EXPRESSION IN INTESTINAL EPITHELIUMP30DK040561 · NIDDK · MASSACHUSETTS GENERAL HOSPITAL · PI Elizabeth Austen Lawson, Takara Leah Stanley · 1994 to 2026
$31.6M
Transgenic CoreP30DK046200 · NIDDK · TUFTS MEDICAL CENTER · PI CORKEY, BARBARA E. · 1992 to 2021
$25.0M
PCBs, Phthalates and Male Reproductive HealthR01ES009718 · NIEHS · HARVARD UNIVERSITY (SCH OF PUBLIC HLTH) · PI HAUSER, RUSS B · 1999 to 2018
$11.6M
Maternal and Paternal Flame Retardant Exposure, Impact on Fertility and PregnancyR01ES022955 · NIEHS · HARVARD SCHOOL OF PUBLIC HEALTH · PI HAUSER, RUSS B, MEEKER, JOHN D. · 2014 to 2018
$2.9M
NIDDK NIH HHS P30 DK040561NIDDK NIH HHS P30 DK046200NIEHS NIH HHS P30 ES000002NIEHS NIH HHS R01 ES009718NIEHS NIH HHS R01 ES022955
6 · The paper itself

Abstract

objectiveTo investigate the association of hair mercury (Hg) levels with antral follicle count (AFC), as a marker of ovarian reserve, and evaluate whether this relationship differed among women with high vs. low total intake of long chain omega-3 polyunsaturated fatty acids (n3PUFA) from foods and supplements.

designWe included 353 women attending an academic fertility center (2007-2019) who had data on hair Hg levels, total n3PUFA intake, and AFC.

methodsHair Hg levels were assessed using a Direct Mercury Analyser, total n3PUFA intake was estimated using an extensively validated food frequency questionnaire, and AFC was assessed by transvaginal ultrasonography. Poisson regression models adjusted for potential confounders were used to evaluate the association of hair Hg levels (divided into tertiles, and as above vs below EPA reference (1 ppm)) with AFC. Associations were also evaluated after stratification by median n3PUFA intake (≤0.124% vs. >0.125% calories/week).

resultsWomen's median hair Hg level was 0.60 ppm (range = 0.001-8.60 ppm), with more than 30% > 1 ppm (EPA reference level). Hair Hg was positively related to AFC after adjusting for age, BMI, smoking status, infertility diagnosis, and alcohol intake. However, associations became attenuated after adjustment for intake of total n3PUFA. The positive associations of hair Hg and AFC were observed only among women above the median total n3PUFA intake. Specifically, women who consumed >0.125% calories/week of total n3PUFA had mean AFCs of 11.9, 13.2 and 14.1, respectively, across increasing tertiles of hair Hg (p,trend = 0.004). Similar results were found when hair Hg was divided above vs below EPA reference (mean AFC = 12.7 vs. 14.1, p = 0.008).

conclusionsIn these women, positive associations of hair Hg with AFC may be reflective of beneficial effects of n3PUFA on ovarian reserve rather than a beneficial effect of Hg per se. Our findings highlight the importance of considering diet when exploring Hg effects on women's reproductive health in urban settings.

Indexed as

Fatty Acids, Omega-3MercuryOvarian ReserveFemaleHumansOvarian FollicleReproductionFatty Acids, Omega-3MercuryMercuryOmega3Ovarian reserve

Identifiers

PMID34388609
PMCPMC8448931
OpenAlexW3192672631

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.