Dietary fibre intake and lifestyle characteristics in relation to nausea or vomiting during pregnancy-a questionnaire-based cohort study.

Nausea or vomiting in pregnancy (NVP) are among the commonest symptoms experienced in early pregnancy. We wanted to evaluate the association of dietary fibre intake, lifestyle characteristics and bowel function with NVP. One hundred and eighty-eight participants completed a self-administered questionnaire concerning bowel function, dietary fibre intake and lifestyle characteristics. Women suffering from NVP (n = 91) consumed significantly more fibre derived from cereal products (p=.026) and total fibre (p=.043) during pre-pregnancy period was compared to women without NVP (n = 97). In both groups, intake of total fibre and fibre derived from fruit and vegetables increased significantly during the first trimester. Dietary fibre intake did not protect from NVP. However, women suffering from NVP were able to maintain their fibre intake. Dietary fibre is tolerated well during NVP, and this finding can be used when giving diet counselling to women suffering from NVP.Impact statementWhat is already known on this subject? Nausea or vomiting in pregnancy (NVP) are among the commonest symptoms experienced in early pregnancy. The pathophysiology of NVP remains unknown, but it has been suggested to be multifactorial. Diet during pregnancy may have an impact on NVP. It is generally advised to avoid meat, poultry, fish, eggs and spicy and fatty foods during periods of NVP, but there is limited data on the effects of diet of NVP.What do the results of this study add? Women suffering from NVP have been shown to eat less meat (and thus protein) compared to women without NVP. Dietary fibre reduces constipation and heartburn and it also keeps blood glucose levels stable. Because of various beneficial effects of fibre on the digestive system, we hypothesised that a high fibre intake may alleviate the symptoms of NVP.What are the implications of these findings for clinical practice and/or further research? The aim of the present study was to investigate whether the amount or source of dietary fibre are associated with NVP. We wanted to investigate intake of fibre derived from cereal products (mostly representing insoluble fibre) and fibre derived from fruit and vegetables (containing mostly soluble fibre) separately in relationship to NVP, as the mechanisms of action of these fibre groups are different. There are no observational studies including also pre-pregnancy consumption of fibre when focussing on the association between fibre and NVP. The results of this study can be used when giving diet counselling to women suffering from NVP.

The association of temperament with nausea and vomiting during early pregnancy.

ABSRACT We aimed to investigate the relationship between affective temperaments and the severity of nausea and vomiting symptoms in early pregnancy (NVP). The pregnant women who did (n = 187) or did not report (n = 71) any nausea and vomiting at three consecutive assessments with the Pregnancy-Unique Quantification of Emesis Scoring Index (PUQE) (n = 71) were examined. Affective temperamental traits were assessed by Temperament Evaluation of Memphis, Pisa, Paris and San Diego auto-questionnaire (TEMPS-A). The anxious (p < .0001), depressive (p = .003), cyclothymic (p = .03) and irritable (p = .021) temperament traits in NVP patients were significantly higher than in controls. There were significant correlations between the PUQE scores and depressive (p = .002), cyclothymic (p = .001), irritable (p = .001) and anxious (p = .001) traits. Anxious temparement (p = .004) and being a housewife (p = .012) were significantly associated with NVP. Our results suggest that women with a predominantly anxious temperament are more vulnerable to developing somatic complaints such as nausea and vomiting during pregnancy. IMPACT STATEMENT What is already known on this subject? Although some studies have examined the link between NVP and some psychiatric disorders, to our knowledge the relationship between NVP and affective temperament has not been well investigated. What do the results of this study add? Predominantly anxious temperament make the individuals vulnerable to develop some somatic complaints such as nausea and vomiting during pregnancy. What are the implications of these findings for clinical practice and/or further research? The association of temperament and NVP might be linked to a psychosomatic process in pregnancy. Future research are required to examine the associations of temperament with NVP by including several other biological, social and psychological variables.

Nausea and vomiting of pregnancy: A study with pregnancy-unique quantification of emesis questionnaire.

OBJECTIVES: Nausea and vomiting of pregnancy (NVP) is frequent, affecting up to 70-85% of pregnant women. However, severity of NVP especially in clinical practice is often uncertainly assessed and thus both under- and overdiagnosing is probable. Furthermore, risk factors for NVP, although recognized, are not well established. The aim of our study was to evaluate the severity of NVP with a structured questionnaire and evaluate associative risk factors. STUDY DESIGN: Sample of 2411 women were recruited from maternity health care clinics. Severity of NVP was assessed with pregnancy-unique quantification of emesis (PUQE) questionnaire. Age, previous pregnancies, previous deliveries, previous miscarriages including ectopic pregnancies, previous pregnancy terminations, nationality, pre-pregnancy body mass index, smoking, marital status and employment were used as explanatory factors. RESULTS: Altogether 88.0% of the women reported some level of NVP, of which 6.4% was severe, 52.2% moderate and 29.4% mild. Daily duration of NVP was ≥ four hours in 12 h in 45.0%. Further, 18.8% of the women had vomiting episodes ≥ three times and 37.4% retching episodes ≥ three times in 12 h. Women with ≥ two previous pregnancies had increased risk for more severe NVP (OR 2.17, 95%CI; 1.34-3.51, p < 0.0001). Older women had increased daily duration of nausea (OR 1.03, 95%CI; 1.00-1.06, p = 0.004) but lower number of vomits (OR 0.93, 95%CI; 0.93-0.97, p < 0.0001) and lower number of retching (OR 0.93, 95%CI; 0.90-0.96, p < 0.0001). Smokers had shorter daily duration of nausea (OR 0.49, 95%CI; 0.33-0.73, p < 0.0001), but higher number of vomiting episodes compared to non-smokers (OR 1.83, 95%CI; 1.26-2.66, p = 0.021). CONCLUSIONS: Women suffered from NVP very frequently. The daily duration of NVP was moderately long, in nearly half of the women four hours or more. In addition, retching was more frequent than vomiting. From studied risk factors, few associations with different aspects of NVP emerged, but only multiparity was associated with the severity of NVP. As NVP affects several women during pregnancy, in future, the impact of NVP on quality of life, future family planning and health costs should be evaluated.

Interventions for nausea and vomiting in early pregnancy.

BACKGROUND: Nausea, retching and vomiting are very commonly experienced by women in early pregnancy. There are considerable physical, social and psychological effects on women who experience these symptoms. This is an update of a review of interventions for nausea and vomiting in early pregnancy last published in 2014. OBJECTIVES: To assess the effectiveness and safety of all interventions for nausea, vomiting and retching in early pregnancy, up to 20 weeks' gestation. SEARCH METHODS: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register, the Cochrane Complementary Medicine Field's Trials Register (19 January 2015) and reference lists of retrieved studies. SELECTION CRITERIA: All randomised controlled trials of any intervention for nausea, vomiting and retching in early pregnancy. We excluded trials of interventions for hyperemesis gravidarum, which are covered by another Cochrane review. We also excluded quasi-randomised trials and trials using a cross-over design. DATA COLLECTION AND ANALYSIS: Four review authors, in pairs, reviewed the eligibility of trials and independently evaluated the risk of bias and extracted the data for included trials. MAIN RESULTS: Forty-one trials involving 5449 women, met the inclusion criteria. These trials covered many interventions, including acupressure, acustimulation, acupuncture, ginger, chamomile, lemon oil, mint oil, vitamin B6 and several antiemetic drugs. There were no included studies of dietary and other lifestyle interventions. Evidence regarding the effectiveness of P6 acupressure, auricular (ear) acupressure and acustimulation of the P6 point was limited. Acupuncture (P6 or traditional) showed no significant benefit to women in pregnancy. The use of ginger products may be helpful to women, but the evidence of effectiveness was limited and not consistent, though three recent studies support ginger over placebo. There was only limited evidence from trials to support the use of pharmacological agents including vitamin B6, Doxylamine-pyridoxoine and other anti-emetic drugs to relieve mild or moderate nausea and vomiting. There was little information on maternal and fetal adverse outcomes and on psychological, social or economic outcomes.We were unable to pool findings from studies for most outcomes due to heterogeneity in study participants, interventions, comparison groups, and outcomes measured or reported. The methodological quality of the included studies was mixed. Risk of bias was low related to performance bias, detection bias and attrition bias for most studies. Selection bias risk was unclear for many studies and almost half of the studies did not fully or clearly report all pre-specified outcomes. AUTHORS' CONCLUSIONS: Given the high prevalence of nausea and vomiting in early pregnancy, women and health professionals need clear guidance about effective and safe interventions, based on systematically reviewed evidence. There is a lack of high-quality evidence to support any particular intervention. This is not the same as saying that the interventions studied are ineffective, but that there is insufficient strong evidence for any one intervention. The difficulties in interpreting and pooling the results of the studies included in this review highlight the need for specific, consistent and clearly justified outcomes and approaches to measurement in research studies.

Prevalence and persistence of nausea and vomiting along the pregnancy / Prevalencia y persistencia de náuseas y vómitos durante el embarazo

Background/aims: Nausea and vomiting of pregnancy (NVP) impact in the pregnant woman’s quality of life, especially when are persistent or severe. The objective is to estimate the prevalence and factors associated with the persistence of NVP in each trimester of pregnancy. Methods: We studied a cohort of 263 pregnant women with gestational age < 12 weeks. Data were collected using the Gastro- Esophageal Reflux Questionnaire validated for use in the Spanish population. Data were collected through telephone interviews at the end of each trimester of pregnancy. The main variable was the presence of NVP in each trimester and their persistence along the pregnancy. Results: The prevalence of nausea in the each trimester was 63.5 %, 33.8 %, 26.2 %, and vomiting was 29.3 %, 22.1 %, 14.1 %, respectively. Factors associated with nausea in the first trimester were Latin-American origin (OR: 3.60, 95 %IC 1.61- 80.5) and primary education (OR: 0.31; 0.13-0.73); vomiting was associated with Latin-American origin (OR: 13.80, 1.82-104.4) and was inversely associated with weight gain (OR: 0.58, 0.35- 0.97). Persistence of NVP were only associated with suffering the symptom in the previous trimester (p < 0.01), and did not find other predictor factors. Conclusions: NVP’s prevalence declines along pregnancy, is associated with race and inversely with weight gain, and its persistence over time cannot be predicted (AU)

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Interventions for nausea and vomiting in early pregnancy.

BACKGROUND: Nausea, retching and vomiting are very commonly experienced by women in early pregnancy. There are considerable physical, social and psychological effects on women who experience these symptoms. This is an update of a review of interventions for nausea and vomiting in early pregnancy previously published in 2010. OBJECTIVES: To assess the effectiveness and safety of all interventions for nausea, vomiting and retching in early pregnancy, up to 20 weeks' gestation. SEARCH METHODS: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register and the Cochrane Complementary Medicine Field's Trials Register (27 April 2013). SELECTION CRITERIA: All randomised controlled trials of any intervention for nausea, vomiting and retching in early pregnancy. We excluded trials of interventions for hyperemesis gravidarum, which are covered by another Cochrane review. We also excluded quasi-randomised trials and trials using a cross-over design. DATA COLLECTION AND ANALYSIS: Four review authors, in pairs, reviewed the eligibility of trials and independently evaluated the risk of bias and extracted the data for included trials. MAIN RESULTS: Thirty-seven trials involving 5049 women, met the inclusion criteria. These trials covered many interventions, including acupressure, acustimulation, acupuncture, ginger, chamomile, lemon oil, mint oil, vitamin B6 and several antiemetic drugs. We identified no studies of dietary or other lifestyle interventions. Evidence regarding the effectiveness of P6 acupressure, auricular (ear) acupressure and acustimulation of the P6 point was limited. Acupuncture (P6 or traditional) showed no significant benefit to women in pregnancy. The use of ginger products may be helpful to women, but the evidence of effectiveness was limited and not consistent, though two recent studies support ginger over placebo. There was only limited evidence from trials to support the use of pharmacological agents including vitamin B6, and anti-emetic drugs to relieve mild or moderate nausea and vomiting. There was little information on maternal and fetal adverse outcomes and on psychological, social or economic outcomes. We were unable to pool findings from studies for most outcomes due to heterogeneity in study participants, interventions, comparison groups, and outcomes measured or reported. The methodological quality of the included studies was mixed. AUTHORS' CONCLUSIONS: Given the high prevalence of nausea and vomiting in early pregnancy, women and health professionals need clear guidance about effective and safe interventions, based on systematically reviewed evidence. There is a lack of high-quality evidence to support any particular intervention. This is not the same as saying that the interventions studied are ineffective, but that there is insufficient strong evidence for any one intervention. The difficulties in interpreting and pooling the results of the studies included in this review highlight the need for specific, consistent and clearly justified outcomes and approaches to measurement in research studies.

A new pharmacologic treatment for nausea and vomiting of pregnancy.

Nausea and vomiting of pregnancy (NVP) affects up to 80 percent of pregnant women. This condition is usually self-limiting, but the symptoms can be distressing and interfere with work, social activities and sleep. Symptoms can often be managed by diet and lifestyle changes, but these interventions may not be successful for everyone. In April 2013, the U.S. Food and Drug Administration approved doxylamine succinate 10 mg/pyridoxine hydrochloride 10 mg (Diclegis) as the first medication to specifically treat NVP in more than 30 years. This article reviews the indications, dosage and nursing interventions associated with using doxylamine succinate/pyridoxine to treat NVP.

Effects of ginger for nausea and vomiting in early pregnancy: a meta-analysis.

BACKGROUND: Nausea and vomiting in early pregnancy (NVEP) is commonly encountered in family medicine. Ginger (Zingiber officinale) is a popular nonpharmacological treatment but consensus of its use is lacking. METHODS: We conducted a meta-analysis of clinical trials using ginger for NVEP as published in PubMed and EMBASE, CINAHL, Cochrane Library, and all EBM reviews. Studies satisfying 3 criteria were selected: (1) randomized placebo-controlled design; (2) use of ginger or Z. officinale; and (3) extractable data on improvement in NVEP. Data were synthesized into pooled odd ratios based on the random effects model, and results were tabulated with the aid of Forest plots. RESULTS: We identified 135 potentially relevant records; only 6 studies met the final criteria. Of the total 508 subjects, 256 and 252 subjects were randomly assigned to receive ginger and placebo, respectively. The use of ginger (∼1 g daily) for at least 4 days is associated with a 5-fold likelihood of improvement in NVEP. Heterogeneity among the clinical studies were acknowledged in the final interpretation of results. CONCLUSIONS: Despite the widespread use of ginger in the diet, its clinic value and safety profile in treating NVEP is still unknown. Our meta-analysis suggests that ginger is an effective nonpharmacological treatment for NVEP.

Surviving morning sickness successfully: from patient's perception to rational management.

Nausea and vomiting of pregnancy (NVP) affects up to 85% of pregnant women, with varying degrees of severity. The most severe form of NVP, known as hyperemesis gravidarum (HG), affects up to 2% of pregnancies. Women who have suffered with severe NVP/HG in a previous pregnancy have a 75-85% recurrence rate. Both patients and physicians often fear the use of pharmacological therapies during pregnancy due to the concerns of potential risks to the fetus. The symptoms and impact of NVP and HG can vary greatly among women, therefore treatment must be tailored to the individual. Updated Motherisk guidelines are presented.

Pregnancy sickness: a biopsychological perspective.

Pregnancy sickness is a universal phenomenon, affecting 70% to 85% of all pregnant women. The primary symptoms of pregnancy sickness are nausea, vomiting, and food aversions. In the past, pregnancy sickness was attributed to psychological disturbances of the pregnant woman. However, recent evolutionary psychological and biopsychological studies have reconsidered pregnancy sickness as an embryo-protective mechanism, an evolutionary adaptation to protect the embryo from phytotoxins and other environmental hazards. The biopsychological perspective of pregnancy sickness as an embryo-protective mechanism is presented.

Vitamin B6 supplementation in pregnant women with nausea and vomiting.

OBJECTIVE: To determine whether supplementation with vitamin B(6) improves nausea and/or vomiting in pregnancy. METHODS: This experimental study was conducted with 60 pregnant women experiencing nausea and/or vomiting prior to the 12th gestational week. Of these women, 30 were treated daily with 10mg and the remaining 30 with 1.28 mg of pyridoxine hydrochloride for 2 weeks. The primary outcome was the Pregnancy-Unique Quantification of Emesis and Nausea (PUQE) score in each group at the end of treatment. RESULTS: The women experiencing nausea and/or vomiting in pregnancy had significantly lower levels of circulating vitamin B(6) (P=0.007) compared with those without this symptom. Vitamin B(6) supplementation significantly increased plasma vitamin B(6) concentration (P<0.05 in both groups). There were no significant differences in PUQE score or in plasma concentration levels of protein, dopamine, serotonin, unconjugated estriol, and ghrelin after supplementation between the 2 groups at baseline, but there was a significantly lesser decrease in PUQE score and a greater increase in vitamin B(6) level and vitamin B(6) concentration to plasma protein concentration ratios in group 1 than in group 2 after supplementation (P<0.05 for all). CONCLUSION: Although the high-supplementation group had a greater decrease in PUQE score in comparison to the low-supplementation group, the difference is unlikely to affect the severity of symptoms.

Interventions for nausea and vomiting in early pregnancy.

BACKGROUND: Nausea, retching and vomiting are very commonly experienced by women in early pregnancy. There are considerable physical and psychological effects on women who experience these symptoms. This is an update of a review of interventions for nausea and vomiting in early pregnancy previously published in 2003. OBJECTIVES: To assess the effectiveness and safety of all interventions for nausea, vomiting and retching in early pregnancy, up to 20 weeks' gestation. SEARCH STRATEGY: We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (28 May 2010). SELECTION CRITERIA: All randomised controlled trials of any intervention for nausea, vomiting and retching in early pregnancy. We excluded trials of interventions for hyperemesis gravidarum which are covered by another review. We also excluded quasi-randomised trials and trials using a crossover design. DATA COLLECTION AND ANALYSIS: Four review authors, in pairs, reviewed the eligibility of trials and independently evaluated the risk of bias and extracted the data for included trials. MAIN RESULTS: Twenty-seven trials, with 4041 women, met the inclusion criteria. These trials covered many interventions, including acupressure, acustimulation, acupuncture, ginger, vitamin B6 and several antiemetic drugs. We identified no studies of dietary or other lifestyle interventions. Evidence regarding the effectiveness of P6 acupressure, auricular (ear) acupressure and acustimulation of the P6 point was limited. Acupuncture (P6 or traditional) showed no significant benefit to women in pregnancy. The use of ginger products may be helpful to women, but the evidence of effectiveness was limited and not consistent. There was only limited evidence from trials to support the use of pharmacological agents including vitamin B6, and anti-emetic drugs to relieve mild or moderate nausea and vomiting. There was little information on maternal and fetal adverse outcomes and on psychological, social or economic outcomes. We were unable to pool findings from studies for most outcomes due to heterogeneity in study participants, interventions, comparison groups, and outcomes measured or reported. The methodological quality of the included studies was mixed. AUTHORS' CONCLUSIONS: Given the high prevalence of nausea and vomiting in early pregnancy, health professionals need to provide clear guidance to women, based on systematically reviewed evidence. There is a lack of high-quality evidence to support that advice. The difficulties in interpreting the results of the studies included in this review highlight the need for specific, consistent and clearly justified outcomes and approaches to measurement in research studies.

The effectiveness of discontinuing iron-containing prenatal multivitamins on reducing the severity of nausea and vomiting of pregnancy.

Nausea and vomiting of pregnancy (NVP) is experienced by the majority of pregnant women, and can negatively affect a women's quality of life. It has been suggested in observational studies that iron-containing prenatal multivitamins may increase the severity of NVP. The objective of this study was to determine whether decreasing iron exposure can mitigate NVP symptoms. Data were collected from a prospective cohort at the Motherisk Program in Toronto. Women (n = 97) seeking advice on managing severe NVP were advised to discontinue prenatal multivitamin administration and switch to folic acid, an adult multivitamin or a children's chewable multivitamin. Two-thirds (63 out of 97) (p < 0.001) of those women qualitatively reported an improvement in NVP symptoms after discontinuation of iron-containing prenatal multivitamins. These findings were verified quantitatively using both the pregnancy-unique quantification of emesis and nausea (PUQE) (p < 0.001) and well-being (p < 0.001) scoring systems. This is the first interventional study showing that discontinuation of iron results in improvement of NVP symptoms. Our data suggest that avoiding iron-containing prenatal multivitamins in the first trimester is effective in improving NVP symptoms in the majority of pregnant women suffering from morning sickness.

Relationships among smoking, drinking, betel quid chewing and pregnancy-related nausea and vomiting in Taiwanese aboriginal women.

A cross-sectional survey was conducted to investigate the associations among smoking, drinking, betel quid chewing and pregnancy-related nausea and vomiting (N/V) in Taiwanese aboriginal women. A total of 901 aboriginal women from 11 hospitals were recruited into this study. A structured questionnaire on demographic and obstetric information, smoking history, alcohol consumption, betel quid chewing habits, and N/V by checklist was used to collect data. The findings of this study indicated that the prevalence of N/V, maternal smoking, drinking, and betel quid chewing were 75.6% (n = 682), 22.8% (n = 201), 31.9% (n = 287), and 34.7% (n = 313) respectively. Multiple logistic regression with adjustment for age, body mass index and antiemetics use revealed significant relationships between smoking habits and N/V before confirmation of pregnancy and during pregnancy. In comparison with those who did not smoke, women smoking in excess of 10 cigarettes a day before pregnancy were 1.65 times more likely to develop N/V; and women smoking in excess of 10 cigarettes a day during pregnancy were 2.79 times more likely to develop N/V. Based on the findings of this study, smoking was associated, with a dose-response effect, with pregnancy-related N/V. Reducing the intake of cigarettes could decrease the risk of pregnancy-related N/V. Health care providers should help these women decrease their uncomfortable symptoms and improve their experiences of pregnancy and birth outcome during critical times.

Treatment options for nausea and vomiting during pregnancy.

Nausea and vomiting, common symptoms during pregnancy, often are regarded as an unpleasant but normal part of pregnancy during the first and early second trimesters. Nausea and vomiting of pregnancy (NVP) occurs in approximately 75-80% of pregnant women. The exact etiology and pathogenesis of NVP are poorly understood and are most likely multifactorial. Some theories for the etiology of NVP are psychological predisposition, evolutionary adaptation, hormonal stimuli, and Helicobacter pylori infection. Treatment ranges from dietary and lifestyle changes to vitamins, antiemetics, and hospitalization for intravenous therapy. Treatment generally begins with nonpharmacologic interventions; if symptoms do not improve, drug therapy is added. Although NVP has been associated with a positive pregnancy outcome, the symptoms can significantly affect a woman's life, both personally and professionally. Given the substantial health care costs, as well as indirect costs, and the potential decrease in quality of life due to NVP, providers need to acknowledge the impact of NVP and provide appropriate treatment.