NEW YORK (Reuters Health) - women who are very obese may be able safely to lose some weight during pregnancy - and eventually reduce their risk of needing a caesarean section, a new study suggests.
The results, reported in the journal of Obstetrics Gynecology & add to the evidence that at least a few obese women can throw books during pregnancy without harm to their needs or those of their baby.
But researchers still caution that women should not begin a diet during pregnancy and should rather speak with their physician of any change of diet and healthy lifestyle.
The general recommendations of the Institute of Medicine (IOM), an Advisory Committee to the Government of the United States, say that obese women should win 11 to 20 pounds during pregnancy.
Less than 25 to 35 books is recommended for women of normal weight. But some researchers have criticized the IOM guidelines for not considering the different levels of obesity.
Some studies have suggested that women who are severely obese may win less pregnancy books, or even lose weight without harming their babies or their own health.
In the new study, Dr. Mary Blomberg, of the University of Linkoping in Sweden, examined the medical records for more than 46 000 obese pregnant women who gave birth between 1993 and 2008.
It separates women in three categories of obesity: class 1 obesity, which means an index of body weight (BMI) of 30 and 35; class 2 (a BMI between 35 and 40). and class 3 (BMI of 40 or more).
Blomberg has concluded that women in the last two groups, those who won unless the IOM recommends - or even lost weight - were less likely to deliver a large baby or need a profile in c than their counterparts who did win the quantity recommended.
Women obese class 2, for example, 17% of people who have lost weight had a profile in C, against 24% of those who gained the amount recommended by the IOM.
And babies born to mothers very obese who have lost weight seemed a fare and infants whose mother has acquired the recommended amount.
They were likely to go to fetal distress or have a low Apgar score - a measure of respiration, the frequency heart and other indicators of health right after birth.
The results suggest that it is "at least not harmful" for very obese pregnant women earn less that recommends the IOM, or perhaps lose pounds, Blomberg said Reuters Health by email.
However, exactly how much weight loss could be safe is uncertain. Blomberg had no information on the range of weight loss in women in this study. And she said that she is unaware of other studies that have suggested a safe range.
It may also be a compromise when obese women lose weight during pregnancy: an increase in the risk of having a baby who is small for gestational age - smaller than the standard for the sex of the baby and the week of pregnancy in which it was born.
Blomberg found that most obese women (a BMI of 40 or more), those who have lost weight were twice as likely to have a baby who was small for gestational age.
However, which bumped up to rate what you generally see in pregnant women. Overall, 3.7% had a newborn small-for - gestational age - compared to a rate of 3.6% of all births in Sweden.
The line from the bottom, according to Blomberg, is that weight loss may be "reasonably safe" for women who are severely obese.
However, it warned women against from any weight loss regime during pregnancy. Instead, she said, they should aim to eat a balanced and healthy diet and get regular moderate exercise, such as a half-hour walk every day.
It is the General Council. But it is the "very important," said Blomberg for obese pregnant women to speak with their own physician of any changes in diet and lifestyle that they need to do.
SOURCE: http://bit.ly/ioOlJ4 Obstetrics Gynecology &, may 2011
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