Trusted Information for Healthy Pregnancies
Archive for January 28, 2010
Delivery mode not altered by pregnancy exercise
Jan 28th
Women benefit from light-intensity resistance exercise during pregnancy and this type of physical activity is not apt to alter the way they deliver their baby, study findings hint.
Regular exercise during pregnancy offers overall health benefits, Dr. Ruben Barakat, at Universidad Politecnica de Madrid in Spain, and colleagues note in the American Journal of Obstetrics and Gynecology. However, few investigations have focused on the effects of resistance-type exercise during pregnancy and whether this alters actual childbirth.
Therefore, they compared delivery outcomes after supervised toning and resistance exercises for shoulders, arms, pelvis, and legs, plus toning and mobilization of associated joints, in 80 women during mid to late pregnancy, compared with 80 non-exercising peers.
All of the women previously obtained less than 20 minutes of exercise on 3 or fewer days each week, a low level of exercise the "controls" maintained. By contrast, the exercise group participated in 3 weekly toning and resistance sessions of less than an hour each from pregnancy week 12 or 13 through delivery.
There were no adverse effects noted in the 72 exercising women or the 70 controls that completed the study.
And, in contrast to a previous report of increased vaginal delivery associated with regular exercise during pregnancy, Barakat's team found no differences in delivery mode between the groups.
Fifty-one exercisers delivered vaginally, another 10 had a delivery requiring instruments, and 11 had Cesarean, compared with 50, 9, and 11, respectively, in the non-exercisers.
The groups also similarly required epidural anesthesia and had similar average durations of complete dilation and delivery, and their newborns were similarly healthy.
"Women in the training group were rather pleased with the exercise training," Barakat and colleagues note in their report.
This finding, coupled with the exercisers desire to be physically active during future pregnancies, and the lack of exercise complications, supports the overall benefits of supervised, light-intensity exercise during pregnancy, they conclude.
Source
Omega-3 Supplements Don’t Reduce Risk of Preterm Birth
Jan 28th
Omega-3 fatty acid supplements are believed to have many health benefits, but the one thing they can't do is help women with a history of delivering their babies early carry their next child to full term, new research finds.
"The omega-3 did not add any benefit," said study author Dr. Margaret Harper, an associate professor of obstetrics and gynecology at Wake Forest University School of Medicine, Winston-Salem, NC. The study appears in the February issue of Obstetrics & Gynecology.
Harper and her colleagues randomly assigned 852 pregnant women with a history of a preterm birth either to get a daily omega-3 supplement or a placebo beginning about week 16 to 22 and continuing through week 36 of gestation.
All women also received weekly intramuscular hormone injections of hydroxyprogesterone caproate, which has been shown to improve the chances of carrying a baby to term, Harper said.
Her team followed up to see which women delivered before 37 weeks. Full-term is defined as 37 weeks of completed gestation.
Delivery before 37 weeks occurred in 37.8 percent of those taking omega-3, and 41.6 percent of those in the placebo group, a small difference.
Prematurity is the leading cause of newborn death, the authors write in the report, and it is increasing in the United States. A woman who delivers one baby before term is more likely to deliver future babies early.
Harper's team decided to study the value of the omega-3 supplements after conflicting findings about the value of the supplements for women at high risk of premature delivery. For those at low-risk, she said, the findings seem to agree that omega-3 supplements don't further reduce the risk of preterm birth.
A recent large review of published studies found only one that showed benefit of the supplements in high-risk women, she said.
According to Harper, omega-3 fatty acids, when metabolized, are converted to much less potent biochemicals called prostaglandins, which make the uterus contract, than are omega-6 fatty acids -- also essential fatty acids but typically over-eaten in Western diets. Adding omega-3s to an omega-6-heavy diet, so the thinking went, might result in better chances of carrying the baby to term.
Omega-3 supplements, in other research, have been found to help heart health, to lower blood pressure and to reduce the risk of abnormal heartbeats.
But in Harper's study, she also noted that women getting omega-3 supplements were more likely to give birth to a baby with respiratory distress syndrome (RDS). While 59 babies (13.9 percent) of those in the omega-3 group had RDS, only 35 (8.7 percent) of those in the placebo group did. In other words, the omega-3 mothers' babies were 1.6 times more likely to get RDS than infants born to mothers taking placebo. It's the first time such a finding has been reported in clinical trials, the authors wrote.
"While the study's results showed no difference, there is early evidence that omega-3 fatty acids are beneficial for fetal brain development, so women should still consider taking them, in conjunction with their doctor's advice, despite what seems to be little benefit for the reduction of spontaneous preterm birth."
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