Does tea consumption during early pregnancy have an adverse effect on birth outcomes?

Lu, Jinhua; He, Jianxing; Shen, Shi‐Li; Wei, Xu-Hong; Chen, Niannian; Yuan, Mingyang; Qiu, Lan; Li, Weidong; Chen, Qiaozhu; Hu, Cui-Yue; Xia, Huimin; Bartington, Suzanne; Cheng, Kar Keung; Lam, Hubert; Qiu, Xiu

doi:10.1111/birt.12285

Cited by 10 publications

(14 citation statements)

References 34 publications

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“…In this cohort, the frequency of excessive tea consumption increased with the increase in maternal age and parity along with smoking and employment, similar to that reported in other studies [18][19][20].…”

Section: Discussionsupporting

confidence: 90%

Effects of excessive tea consumption on pregnancy weight gain and neonatal birth weight

2021

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Objective Tea lovers are increasing worldwide. We hope that this report is the first to discuss the possible impacts of high black tea consumption on gestational weight gain (GWG) and birth parameters. Methods Throughout one year, a total of 7,063 pregnant ladies coming for first antenatal visit were screened in a major tertiary center. Of them, 1,138 were involved and divided according to their preference into 3 groups: excessive tea (ET), usual tea (UT), and mixed beverages group. The study included women who gave birth to healthy neonates. Results The rate of ET consumption was 4.13% with a total of 41 cases. The UT group (controls) comprised 94 women. ET was significantly associated (P<0.05) with maternal age, parity, occupation, smoking, and poor GWG starting from 30 weeks' gestation until delivery, low birth weight, and small for gestational age (SGA). Poor GWG had a higher relative risk (with 95% confidence interval) in the ET group than in the UT group in crude (1.84 [0.85-2.43]) and risk adjusted models (1.25 [0.28-2.26]). Further, similar results were obtained for SGA in the crude and 3 adjusted models, where the first model was adjusted for bio-obstetrical variables, the second for social parameters, and the third for all factors included in the previous models (1.53 [0.62-2.81], 1.52 [0.71-2.50], and 1.46 [0.78-2.39]), respectively. Conclusions Consumption of large amounts of daily black tea during pregnancy (≥1,500 mL) is a significant cause of poor GWG and SGA.

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Section: Discussionsupporting

confidence: 90%

Effects of excessive tea consumption on pregnancy weight gain and neonatal birth weight

2021

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“…Hence, tea intake is strictly restricted in patients suffering from cardiovascular problems. Breastfeeding and pregnant women should avoid over-consumption of green tea because it do causes tachycardia in them giving rise to higher health risks to fetus [63,64]. The presence of aluminum in black and green teas also suggested increased accumulation of the same inside the body affecting the neural well-being and causing neurological disorders [65].…”

Section: Therapeutic Limitations Of Tea Compoundsmentioning

confidence: 99%

Remedial Effects of Tea and Its Phytoconstituents on Central Nervous System

Singh¹,

Tyagi²,

Agarwal³

2019

Tea - Chemistry and Pharmacology [Working Title]

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Tea in all its forms is one of the commonly consumed beverages globally, after water. Apart from just being a beverage, it also has extensive therapeutic values. The phytoconstituents of tea either in their pure form or as an extract are essential part of traditional as well as modern day medicines. Tea has shown its medicinal benefits in treating, improving and preventing many of the ailments ranging from being potential antimicrobial, antioxidant agent to being central nervous system (CNS) stimulants. This chapter focuses specifically on physiological impacts that each of its constituents have over our nervous system like role of L-theanine to enhance dopamine and serotonin levels, theobromine, and theophylline for stimulating CNS, caffeine to inhibit adenosine receptors, hence, causing increase in brain activity etc. along with many more neuroprotective properties of tea constituents.

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“…いた (Huang, et al 2016；Lu, et al 2017 (Huang, et al 2016； Lu, et al 2017； Okubo, et al 2015；Sengpiel, et al 2013 (1.10-2.35)) 。一方，その他の 3 件の論文 (Huang, et al 2016；Lu, et al 2017；Okubo et al 2015)では，紅茶の摂取と早産に関連は見られなかった。妊娠中の紅茶の摂取量を週 3 杯または 1 日 1 杯で分類している 3 件の論文 (Huang, et al 2016；Lu, et al 2017；Okubo (Huang, et al 2016) ，週 3 杯より多い (Lu, et al 2017) ，1 日 1 杯以上 (Berkowitz, et al 1982) で分類された High tea consumption 群と，週 3 杯未満，週 3 杯以下，1 日 1 杯未満で分類された Low tea consumption 群を比較した。２) 在胎週数 (１) 茶の種類によらず，摂取量で分類 2 件の論文 (Chen, et al 2018；Hoeven, et al 2017 が種類によらず茶の摂取量と在胎週数の関連を調査していたが，それらに関連は見られなかった。 (２) 茶の種類別摂取量で分類烏龍茶の摂取量と在胎週数の関連を調査した 1 件の論文 (Lu, et al 2017) (Colapinto, et al 2015； Fortier, et al 1993；Hoeven, et al 2017；Lu, et al 2017 (Lu, et al 2017)では，それらの関連は見られなかった。 3 件の論文 (Lu, et al 2017； Okubo, et al 2015； Sengpiel, et al 2013…”

Section: ⅰ．緒言unclassified

“…Mantel-Haenszel 検定 CI. Confidence Interval 紅茶の摂取量が週 3 杯より多い (Lu, et al 2017) ，1 日 1 杯以上 (Okubo, et al 2015) で分類された High tea consumption 群と，週 3 杯以下，1 日 1 杯未満で分類された Low tea consumption 群を比較した。られなかった(OR (95%CI)=0.98 (0.66-1.44)) 。統計学 (Brooke, et al 1989；Caan, et al 1989； Chen, et al 2018；Hoeven, et al, 2017；Sengpiel, et al…”

Section: ⅰ．緒言unclassified

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Effects of tea consumption during pregnancy on preterm birth and small for gestational age: A systematic review

梨央

三恵

2019

J. Jpn. Acad. Midwif.

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Tea consumption during pregnancy is assumed to increase the risks of preterm birth and small for gestational age (SGA). However, this association remains unclear. This review aimed to assess the effects of tea consumption during pregnancy on preterm birth and SGA. Method A search through 4 databases (PubMed, CINAHL, CiNii, and Ichushi-Web) and handsearches were conducted for identifying relevant publications in Japanese and English. We first screened the identified articles based on the inclusion and exclusion criteria and then evaluated the quality of articles using a risk-of-bias assessment tool. We used Mantel-Haenszel test to integrate the results of articles included in the review. Results Eleven articles were included in the review. Five articles examined the association between any tea consumption during pregnancy and preterm birth. Among the 5 articles, a meta-analysis of 3 articles that had the similar classification criteria for tea consumption indicated that the risk of preterm birth was significantly higher in women with high tea consumption (3 or more cups per week or 1 or more cups per day) than in women with low tea consumption (odds ratio=1.32, 95% confidence interval=1.06-1.63). By tea type, the consumption of green, Japanese and Chinese, or black tea was associated with an increased risk of preterm birth in 3 out of 7 relevant articles. However, meta-analyses showed no significant associations between the consumption of green or black tea and preterm birth. Black tea consumption during pregnancy was reported to be associated with an increased risk of SGA in 1 out of 7 relevant articles. In meta-analysis, no significant association between black tea consumption and SGA was found. Conclusion The meta-analysis showed an association between any tea consumption and preterm birth. On the other hand, there was no association between tea consumption and SGA. Further research regarding an association between tea consumption and SGA is required because of the small number of studies that could be used in the meta-analysis. Healthcare professionals would need to grasp individual daily tea consumption and inform pregnant women of the possible association between high tea consumption and an increased risk of preterm birth.

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Does tea consumption during early pregnancy have an adverse effect on birth outcomes?

Cited by 10 publications

References 34 publications

Effects of excessive tea consumption on pregnancy weight gain and neonatal birth weight

Effects of excessive tea consumption on pregnancy weight gain and neonatal birth weight

Remedial Effects of Tea and Its Phytoconstituents on Central Nervous System

Effects of tea consumption during pregnancy on preterm birth and small for gestational age: A systematic review

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