2013年职称英语综合类C级概括大意模拟题(25). g& z& r. @8 D
Safe Coffee Drinking of Pregnant Women 4 W1 U; \8 Y( w$ F# C: L9 {
1 researchers found no evidence of a link between prematurity ,birth weight and the amount of caffeine consumed by mothers-to-be. 3 F: V. ?8 f) g E
2 previous studied suggested caffeine might harm unborn babies as is stays in the system longer in pregnant women, passing easily to a growing baby. Health officials have warned that a high caffeine intake could affect birth weight or the chance of having a miscarriage , pregnant women are advised against drinking more than four cups of coffee a day-or six cups of tea.
& I6 h8 p9 w, E+ ~5 c/ m. c$ {/ n: C 3 the study ,by the university of Aarhus in Denmark ,recruited more than 1,000women before they were 20 week’s pregnant, who drank at least three cups of coffee a day. The group was split into two, with 568 women drinking ordinary instant coffee and 629 drinking decaffeinated. The authors then monitored the birth weight of 1,150 newborn babies and the length of pregnancy for the babies.
. a1 ]0 D! w3 a9 C* t8 H 4 the study, published by the British Medical Journal, found “no significant difference” between the two groups for birth weight or length of pregnancy. The researchers concluded that a moderate reduction in caffeine intake in the second half of pregnancy had “no effect” on the outcome.
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5 the women were not told what type of coffee they were drinking ,and the research was adjusted to take into account factors such as age, weight and whether the women smoked. When the adjustments were made, the average weight of babies born to women in the decaffeinated group was a mere 16g higher than those born to women in the caffeinated group, the study said. The average difference in the length of pregnancy was less than two days. |