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zoom RSS 妊婦に1日1杯のコーヒーは問題なし/米国

<<   作成日時 : 2010/07/22 21:24   >>

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1日1杯のコーヒーなら妊婦にも安全
 米国産婦人科学会の新たなガイドラインでは、1日1杯のコーヒーのカフェイン量では流産や早期産との関連はないという。
 文献レビューによれば、カフェイン量として1日200mg未満なら、流産や早期産との関連は全く見られなかった。妊娠中のカフェイン摂取が胎児の成長に影響を与えるかどうかははっきりしたことは言えない。より高容量のカフェインと流産危険度との関連についても明確な結論は出せないが、いくつかの研究では示唆されている。
 ドリップコーヒー1杯には平均137mgのカフェインが含まれている。インスタントコーヒーでは76mgである。カフェイン200mg未満なら全く害を及ぼさないという。

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Moderate Caffeine Intake Safe During Pregnancy, Experts Say
A cup a day not linked to miscarriage or preterm birth, new guidelines suggest
By Kathleen DohenyHealthDay Reporter
http://health.msn.com/nutrition/articlepage.aspx?cp-documentid=100261446

画像A cup a day not linked to miscarriage or preterm birth, new guidelines suggest

WEDNESDAY, July 21 (HealthDay News) -- Women can drink a cup of coffee or one soft drink a day during pregnancy and not worry that it might put them at risk of miscarriage or preterm birth, according to new guidelines released by the American College of Obstetricians and Gynecologists.

The professional group issued the information from its Committee on Obstetric Practice, which reviewed studies on the topic before making a decision.

"Finally, we have good evidence to show that having a cup of coffee a day is fine and it poses no risk to the fetus," said Dr. William H. Barth Jr., chairman of the committee on obstetric practice and chief of the division of maternal-fetal medicine at Massachusetts General Hospital in Boston.

They are talking about a reasonably sized cup of coffee or serving of soda, of course.

After the committee reviewed the published medical literature, they found no link between moderate intake of caffeine -- defined as less than 200 milligrams (mg) per day -- and either miscarriage or preterm birth.

The experts can't say for sure whether caffeine intake during pregnancy restricts fetal growth. And they have no conclusion about the effects of higher levels of caffeine and miscarriage risk.

As for higher levels, "we just don't know," Barth said. "Some studies have suggested a higher rate of miscarriage with higher levels of caffeine; others not."

To put things in perspective, an 8-ounce cup of brewed, drip coffee averages 137 mg of caffeine, according to the group, while an 8-ounce cup of instant coffee has 76 mg. A 12-ounce soft drink has 37 mg of caffeine and an 8-ounce cup of chocolate milk has 5 mg to 8 mg.

The committee's opinion is published in the August issue of Obstetrics & Gynecology.

Another expert, Dr. Gene Burkett, a professor of obstetrics and gynecology at the University of Miami Miller School of Medicine, reviewed the same evidence as the committee and said the new opinion makes sense.

"If you take less than 200 milligrams of caffeine, it does no harm," he said. "There is not data to suggest that a cup of coffee will hurt anyone."

"Anything in moderation is reasonable, and I think one cup of coffee is moderate," he said.

For the review, Barth and the other committee members found two recent studies that saw no significant increase in miscarriage risk with levels of caffeine intake at less than 200 mg daily.

They also found two large studies that looked at any relationship between caffeine intake and preterm birth, and neither found a link between moderate intake of caffeine and early delivery.

Miscarriage is defined as a spontaneous loss of a pregnancy before 20 weeks; most occur, experts say, because a fetus isn't developing normally.

About 15 percent to 20 percent of pregnancies end in miscarriage, according to the group, and often within the first 13 weeks. Symptoms can include spotting or bleeding without pain, or heavy persistent bleeding with pain and cramping.

More information

To learn more about miscarriage, visit the American College of Obstetricians and Gynecologists.
SOURCE: William Barth Jr., M.D., chief, division of maternal-fetal medicine, Massachusetts General Hospital, and associate professor, obstetrics, gynecology and reproductive biology, Harvard Medical School, Boston; Gene Burkett, M.D., professor, obstetrics and gynecology, University of Miami Miller School of Medicine; August 2010 Obstetrics & Gynecology

Copyright @2010 HealthDay. All Rights Reserved.

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For Release: July 21, 2010
No Link Between Moderate Caffeine Consumption and Miscarriage
http://www.acog.org/from_home/publications/press_releases/nr07-21-10-3.cfm

Washington, DC -- Pregnant women can ease their minds about drinking a cup of coffee or having a soft drink―moderate caffeine consumption doesn't appear to cause miscarriage or preterm birth, according to The American College of Obstetricians and Gynecologists. However, The College says it remains unclear whether high levels of caffeine consumption have any link to miscarriage, according to its Committee Opinion published in the August Obstetrics & Gynecology.

"For years, women have been getting mixed messages about whether or not they should have any caffeine during pregnancy," said William H. Barth, Jr, MD, chair of the Committee on Obstetric Practice. "After a review of the scientific evidence to date, daily moderate caffeine consumption doesn't appear to have any major impact in causing miscarriage or preterm birth."

Moderate caffeine consumption is considered less than 200 mg of caffeine per day. In practical terms, this equates to about 12 ounces of coffee. Caffeinated tea and most soft drinks have much less caffeine (less than 50 mg), as do the average chocolate candy bars (less than 35 mg). High levels of caffeine intake would be considered daily consumption of over 200 mg of caffeine.

The Committee on Obstetric Practice, which issued the new Committee Opinion "Moderate Caffeine Consumption During Pregnancy," also reviewed the scientific evidence related to caffeine's effect on fetal growth. It found no clear evidence showing that caffeine increases the risk of restricting fetal growth.

When asked what this means for pregnant women, Dr. Barth said, "Given the evidence, we should reassure our pregnant patients and let them know that it's OK to have a cup of coffee."

Committee Opinion #462, "Moderate Caffeine Consumption During Pregnancy," is published in the August 2010 issue of Obstetrics & Gynecology.

# # #

The American College of Obstetricians and Gynecologists is the nation's leading group of physicians providing health care for women. As a private, voluntary, nonprofit membership organization of approximately 53,000 members, The American College of Obstetricians and Gynecologists strongly advocates for quality health care for women, maintains the highest standards of clinical practice and continuing education of its members, promotes patient education, and increases awareness among its members and the public of the changing issues facing women's health care.

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