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Alcohol and caffeine consumption and decreased fertility
Open accessAbstract
OBJECTIVE: To examine the effects of alcohol and caffeine on conception. DESIGN: Prospective observational study. SETTING: Healthy volunteers in two manufacturing facilities. PATIENT(S): One hundred twenty-four women who provided daily urine samples for measurement of steroid hormones and hCG, and prospective information about alcohol and caffeine consumption. MAIN OUTCOME MEASURE(S): Probability of conception per 100 menstrual cycles. RESULT(S): There was >50% reduction in the probability of conception during a menstrual cycle during which participants consumed alcohol. Caffeine consumption did not independently affect the probability of conception but may enhance alcohol's negative effect. Women who abstained from alcohol and consumed less than one cup of coffee or its equivalent per day conceived 26.9 pregnancies per 100 menstrual cycles compared with 10.5 per 100 menstrual cycles among those who consumed any alcohol and more than one cup of coffee per day. CONCLUSIONS: This study revealed an independent dose-related negative effect of alcohol consumption on the ability to conceive. Our results suggest that women who are attempting to conceive should abstain from consuming alcohol.
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“Consuming high levels of alcohol (> 2 drinks per day, with 1 drink > 10 g of ethanol) can affect both female and male fertility and the success of fertility treatment (Hakim 1998, Klonoff-Cohen 2003, Rossi 2011).”
From Preconception lifestyle advice for people with infertility (2021) · cites this paper as Hakim 1998
Citations
Cites
Longitudinal Data Analysis for Discrete and Continuous Outcomes
Zeger, S. L., & Liang, K. (1986) · Biometrics · doi:10.2307/2531248 · Cited by 7,781
ALCOHOL, SMOKING, AND INCIDENCE OF SPONTANEOUS ABORTIONS IN THE FIRST AND SECOND TRIMESTER
Harlap, S., & Shiono, P. H. (1980) · The Lancet · doi:10.1016/s0140-6736(80)90061-6 · Cited by 367
Howe, G. R., Westhoff, C. L., Vessey, M. P., & Yeates, D. (1985) · BMJ · doi:10.1136/bmj.290.6483.1697 · Cited by 265
Drinking during pregnancy and spontaneous abortion
Kline, J., Stein, Z., Shrout, P., Susser, M., & Warburton, D. (1980) · The Lancet · doi:10.1016/s0140-6736(80)90062-8 · Cited by 264
Cigarette, alcohol, and coffee consumption and spontaneous abortion.
Armstrong, B., McDonald, A. D., & Sloan, M. (1992) · American Journal of Public Health · doi:10.2105/ajph.82.1.85 · Cited by 212
CAFFEINATED BEVERAGES AND DECREASED FERTILITY
Wilcox, A. J., Weinberg, C. R., & Baird, D. D. (1988) · The Lancet · doi:10.1016/s0140-6736(88)90933-6 · Cited by 201
Infertility in women and moderate alcohol use.
Grodstein, F., GOLDMAN, M. B., & Cramer, D. W. (1994) · American Journal of Public Health · doi:10.2105/ajph.84.9.1429 · Cited by 187
A double-blind, randomized placebo controlled trial on fish oil in psoriasis
Bittiner, S. B. (1988) · The Lancet · Cited by 179
Using the ratio of urinary oestrogen and progesterone metabolites to estimate day of ovulation
Baird, D. D., Weinberg, C. R., Wilcox, A. J., McConnaughey, D. R., & Musey, P. I. (1991) · Statistics in Medicine · doi:10.1002/sim.4780100209 · Cited by 160
Brahams, D. (1989) · The Lancet · doi:10.1016/s0140-6736(89)90247-x · Cited by 154
Research works printed but not linked: 3
- Mello, 1983, Alcohol effects on estradiol in the female macaque, NIDA Res Monogr, 43, 210
- Gray, 1996, Ethylene glycol ethers and reproductive health in semiconductor workers, Occup Hyg, 2, 331
- O’Connor, 1988, Development of highly sensitive immunoassays to measure human chorionic gonadotropin, its β-subunit, and β core fragments in urine, Cancer Res, 48, 1361
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Metadata
- Authors
- Hakim, R. B., Gray, R. H., & Zacur, H.
- Affiliations
- Johns Hopkins University (US)
- Corresponding author
- Hakim, Rosemarie B
- Venue
- Fertility and Sterility
- Publisher
- Elsevier BV
- Published
- 1998-10
- Volume
- 70
- Issue
- 4
- Pages
- 632-637
- ISSN
- 0015-0282 (ISSN-L)
- OpenAlex
- W2029365618
- Cited by
- 205
- References
- 39
- Citations by year
- 2026: 3 · 2024: 5 · 2023: 5 · 2022: 7 · 2021: 8 · 2020: 59 · 2019: 7 · 2018: 7 · 2017: 10 · 2016: 13 · 2015: 11 · 2014: 4 · 2013: 10 · 2012: 8
- FWCI
- 1.45
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Licence
- Locations
- Fertility and Sterility (publishedVersion, cc-by-nc-nd)
- PubMed (publishedVersion)
- Funders
- National Institutes of Health (5p30hd006268-28)
- Eunice Kennedy Shriver National Institute of Child Health and Human Development (5-P30-HD06268)
- Topics
- Health Sciences › Medicine › Reproductive Medicine › Reproductive Health and Technologies
- Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
- Health Sciences › Medicine › Reproductive Medicine › Reproductive Biology and Fertility
- Keywords
- alcohol consumption, caffeine consumption, coffee, female fertility, conception probability, menstrual cycle, dose-response relationship, women of reproductive age, human chorionic gonadotropin, steroid hormones
- MeSH terms
- Adult, Alcohol Drinking, Caffeine, Female, Fertility, Humans, Prospective Studies
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