Alcohol and Hormones

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Studies with low density lipoprotein implicated a detrimental role for ethanol, not at the enzymatic level, but at the point of entry of cholesterol into cell organelles prior to progesterone synthesis. Recent research has suggested that the timing of the onset of the menopause may be influenced by smoking Thorell and Svardsudd, , dietary factors Nagata et al.

Specifically, the latter authors concluded that the onset of the menopause is delayed by moderate alcohol consumption. This conclusion was based on the result of a cross-sectioned survey of women who, 2 years previously, had all been pre-menopausal. Significant univariate associations were reported between menopausal status and age of maternal menopause and between menopause status and alcohol consumption. Alcohol consumption was significantly correlated with oestradiol levels and was found to be independently associated with menopausal status.

Grodstein et al. Retrospective data relating to alcohol consumption before the onset of infertility were collected. Moderate alcohol intake g, Olsen et al. Jensen et al.

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A maximum of six menstrual cycles were studied. Records of vaginal bleeding and sexual intercourse were kept daily. Alcohol consumption was monitored retrospectively for 1 week every month. It was concluded that the chances of successful conception decreased with increasing alcohol intake. The fecundity odds ratio odds of conception among exposed couples divided by the odds amongst those not exposed fell from 0. Another prospective study Hakim et al.

Investigation of women attempting to conceive and who had ovulated as evidenced by urinary hormone analysis revealed that the number of conceptions expressed as a percentage of the number of menstrual cycles was Incidents of sexual intercourse were recorded and thus a measure of menstrual cycles where conception was likely was obtained. It is important to note that women with anovular cycles were excluded from analysis and neither Hakim et al.

Indeed Jensen et al. Hakim et al. Several studies have failed to show a negative effect of moderate alcohol consumption on fecundity Florack et al. In this last study the mean recall period for alcohol drinking was 10 years. Zaadstra et al.


Parazzini et al. Consideration of the implications of the findings discussed above must be preceded by three important caveats.

Firstly it must be stressed that it is often difficult to compare directly the alcohol dose administered in the various studies. The second point is that the protocol employed in some experimental studies may have compromised the relevance of the findings to the situation of the normal, socially drinking woman. For example, women have been asked to consume several units of alcohol, in a set time period, after an overnight fast; a situation far removed from usual drinking behaviour and one which may have quite different ramifications for the reproductive system. Finally, it must be emphasized that a too simplistic approach to the interpretation of study findings and therefore their physiological relevance must be avoided.

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It is not possible to overstate the complexity of the hormonal interplay that exists between the hypothalamus, pituitary and gonads. Indeed, considerable intra- and inter-individual variations in hormone levels exist in the normal population. Furthermore, the simple change in the level of a hormone does not necessarily imply that a physiological change must ensue. Changes in a particular fraction of a hormone, or in its ratio to another hormone, may be far more biologically significant.

A variety of study designs have reported an alcohol-induced rise in oestrogen levels. Mendelson et al. It is possible that both mechanisms may be operating. In considering the implications of an alcohol-induced rise in plasma oestrogen level, two questions merit discussion. Does the rise in oestrogen have implications for women's reproductive health and also their general health? With respect to the first question, Mendelson et al. The most obvious consequences of this scenario would be infertility. Studies cited earlier do indeed provide some evidence for a link between moderate alcohol consumption and decreased fecundity.

However, it must be noted that one of these investigations Hakim et al.

Alcohol consumption can increase estrogen—but it's not the same for everyone.

However, failure to ovulate is only one of several reasons for infertility. Alcohol may also affect implantation or early development of the blastocyst. A detrimental effect of alcohol on progesterone levels could, if proven, be relevant here. If Mendelson et al.

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The implications of the long-term loss of these hormones in young women are considerable. In terms of general health, both negative for example cancer risk and positive for example, protection against osteoporosis and cardiovascular disease repercussions of raised oestrogen levels merit discussion. In addition, Eriksson et al. Further studies are required to investigate the proposal by Torgerson et al. In the latter case, alcohol is associated with an early menopause.

The menopause signals the end of the period of life associated with high levels of the cardioprotective reproductive hormones. Therefore a relatively simple way of delaying this occurrence would seem, at first sight, to have obvious health benefits for women and merit investigation.

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Cessation of menstrual cycles is attributed to the limited supply of ovarian follicles present at birth, a small number being lost at each cycle. Thus the timing of the menopause is pre-programmed. Does chronic moderate alcohol use prolong reproductive life by decreasing the number of follicles in the cohort destined for maturation each cycle?

Alternatively, does alcohol, via increased oestrogen levels, ensure that menstrual cycles continue but that they are all anovular? In the latter case, any benefits for women's health of a delayed menopause would be reduced. Presently, research provides more questions than answers. For older women, the potential health benefits of chronic moderate alcohol consumption have received some attention, but the consequences for those on hormone replacement therapy merit further clarification. For younger women, it seems certain that binge drinking although still remaining within weekly guidelines is likely to have quite different health repercussions than regular moderate consumption.

In the specific case of reproductive health, binge drinking may be most detrimental at certain times, namely puberty, the cyclical selection of follicles for maturation, ovulation and the implantation and subsequent survival of the blastocyst. It is clear, however, that, if women at all life stages are to receive meaningful and beneficial health messages, further investigations are urgently required.

Studies investigating the effect of moderate alcohol consumption on post-menopausal women not using hormone replacement therapy. Oxford University Press is a department of the University of Oxford. It furthers the University's objective of excellence in research, scholarship, and education by publishing worldwide. Sign In or Create an Account. Sign In. Advanced Search. Article Navigation. Close mobile search navigation Article Navigation. Volume Article Contents. Oxford Academic. Google Scholar. Cite Citation.

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Permissions Icon Permissions. Abstract Studies that have investigated the effect of moderate alcohol consumption on the level of oestrogens and progesterone in both pre- and post-menopausal women are reviewed. Table 1. Studies investigating the effect of moderate alcohol consumption on pre-menopausal women. Plasma hormone levels. No association between plasma oestrogens at any of 3 cycle phases studied.

Plasma ethanol. Open in new tab. Table 2. Alcohol abstainers characterized by lower oestradiol levels than moderate alcohol users Oestradiol to testosterone ratio elevated abstainers Ahluwalia, B. Curtis, K. Department of Health Sensible Drinking. Report of an inter-departmental working group. Department of Health, London. Dorgan, J. Eriksson, C. Florack, E. Friedman, J. Gavaler, J. Gill, J. Ginsburg, E. Gordon, G. Grodstein, F.