Women who were born preterm are at increased risk of complications during pregnancy compared to those born at term, and the risk almost doubles for mothers born before 32 weeks, according to a study in CMAJ (Canadian Medical Association Journal).
Pregnancy complications include gestational diabetes, gestational hypertension, and preeclampsia or eclampsia.
The findings are based on a study of 7405 women born preterm and 16 714 women born at term between 1976 and 1995 in the province of Quebec. Of the preterm women, 554 were less than 32 weeks at birth and 6851 were at 32- weeks’ gestation.
“We found that the risk of pregnancy complication was significantly higher among women born preterm, independently of their own fetal growth,” writes Dr. Anne Monique Nuyt, Sainte-Justine University Hospital and Research Center, University of Montréal, with coauthors. “When divided into categories of gestational age, the risk of having at least 1 pregnancy complication nearly doubled among women born before 32 weeks’ gestation versus those born at term.”
Fewer babies were born to U.S. teenagers ages 15-19 in 2010 - 367,752 - than in any year since 1946’s 322,380, federal health officials said.
The preliminary report by the National Center for Health Statistics, part of the Centers for Disease Control and Prevention in Atlanta, used the most current data available from the National Vital Statistics System found the 2010 total of births to teenagers was 43 percent lower than the peak recorded in 1970 at 644,708, the report said.
The U.S. teen birth rate declined 9 percent from 2009 to 2010, reaching a historic low at 34.3 births per 1,000 women ages 15-19; the rate dropped 44 percent from 1991 through 2010, the report said.
Use of vitamin D supplements during pregnancy has long been a matter of concern but now researchers writing in the Journal of Bone and Mineral Research report that even a high supplementation amount in healthy pregnant women was safe and effective in raising circulating vitamin D to a level thought by some to be optimal. The study also found no adverse effects of vitamin D supplementation, even at the highest amount, in women or their newborns.
The research team, led by Dr. Bruce Hollis from the Medical University of South Carolina in Charleston, used a randomized controlled trial with healthy expectant mothers to discover how varying dosages of daily supplements could safely sustain a circulating vitamin D level of at least 32 nanograms per milliliter.
“Vitamin D supplementation during pregnancy remains controversial largely due to severe misconceptions about the potential harm it may cause to the fetus,” said Dr Hollis. “Surprisingly the scientific debate has made little progress since Dr. Gilbert Forbes made a recommendation of 200 IU (international units) per day in 1963, which was based on a hunch.”
In a study to be presented today at the Society for Maternal-Fetal Medicine’s (SMFM) annual meeting, The Pregnancy Meeting ™, in San Francisco, researchers will present findings that show that folate intake before and during pregnancy does not protect Norwegian women against spontaneous preterm delivery.
“Sufficient folate intake has been studied as a possible protecting factor against spontaneous preterm delivery with conflicting results,” said Verena Senpiel, M.D., one of the study’s authors. “Preterm delivery is the major cause of perinatal mortality and morbidity worldwide and still difficult to predict and prevent. So when a recent American study found that preconceptional folate supplementation could reduce the risk for early spontaneous preterm delivery 50-70% we hoped to confirm these findings in another big cohort study.”
The study selected controls and cases from the Norwegian Mother and Child Cohort Study (http://www.fhi.no/) that included 72,989 children. Cases were defined as singleton live births with spontaneous onset of preterm delivery between 22 and 36 gestational weeks and after pregnancies without medical or obstetric complications. Controls were chosen according to the same criteria, except spontaneous onset of term delivery between gestational weeks 39 and 40. Folate data was obtained from questionnaires completed at gestational week 17, 22 and 30, including a semi-quantitative food frequency questionnaire in the second trimester (week 22).
1. Potassium Citrate May Help Prevent and Treat Osteoporosis Supplement Neutralizes Bone Damage Inflicted by the Western Diet
The Western diet creates an acidic environment in the body that removes calcium from bones and may contribute to the development of osteoporosis. Healthy adults who consume the standard US diet sustain a chronic, low-grade state of acidosis that worsens with age as kidney function declines, limiting urinary acid excretion. Reto Krapf, MD (University of Basel, in Bruderholz/Basel, Switzerland) and colleagues designed a study to see if daily alkali as potassium citrate supplement tablets might neutralize these effects. They enrolled 201 healthy elderly individuals of both genders with normal bone mass in a randomized double-blind, placebo-controlled clinical trial. Participants received either 60 mmol alkali as potassium citrate (a base) or a placebo every day for 2 years. Bone density and high resolution computed tomography scans after 2 years revealed that neutralizing diet-induced acid production with potassium citrate significantly and safely increased subjects’ bone density vs. placebo. “In addition, we discovered that bone architecture improved significantly, suggesting that not only bone mass, but also its quality was improved,” said Dr. Krapf. These results suggest and predict that potassium citrate may be effective for preventing and even treating osteoporosis.
Study co-authors include Sigrid Jehle, MD (University of Basel, in Bruderholz/Basel, Switzerland) and Henry N. Hulter, MD (FibroGen, Inc., San Francisco).
Disclosures: The authors reported no financial disclosures.
Kristen M. Swanson, Ph.D., dean of the School of Nursing at the University of North Carolina at Chapel Hill, is available for interviews about President George W. Bush’s disclosure of his mother’s miscarriage in his book ‘Decision Points.’
Swanson is an expert on miscarriage and how couples respond emotionally to it. She began her work on miscarriage 25 years ago with her dissertation, “The Unborn One: A Profile of The Human Experience of Miscarriage,” and has continued studying this area both as an investigator and as a consultant to other researchers’ works.
Although some have been shocked that President George W. Bush saw the fetus in a jar when he drove his mother to the hospital, Swanson said that the holding of the fetus is one of the most tender and private losses that a woman goes through when she miscarries.
A team of researchers, led by Ashley Moffett, at the University of Cambridge, United Kingdom, has shed new light on genetic factors that increase susceptibility to and provide protection from common disorders of pregnancy, specifically recurrent miscarriage, preeclampsia, and fetal growth restriction.
A key step in the initiation of a successful pregnancy is the invasion of the lining of the uterus by fetal cells known as trophoblasts, which become the main cell type of the placenta. Recurrent miscarriage, preeclampsia, and fetal growth restriction are thought to result from inadequate trophoblast invasion of the uterus lining. Interactions between maternal cells known as uterine NK cells and fetal trophoblasts — specifically interactions between HLA-C molecules on the fetal trophoblasts and KIRs on the maternal uterine NK cells — are key to determining the extent of trophoblast invasion. Previous data from Moffett’s lab indicated that a particular combination of fetal HLA-C and maternal KIR was associated with increased risk of preeclampsia. In this study, the team has extended this correlation to recurrent miscarriage and fetal growth restriction. Furthermore, they have determined that the presence of other maternal KIRs that combine with the same HLA-C molecule provides protection against the same common disorders of pregnancy.
The birth of a baby is usually a joyous event, but when a child is born too early, worrisome complications can occur, including serious health problems for the baby and steep medical bills for the family. To address this, Johns Hopkins graduate students and their faculty adviser have invented a new system to pick up very early signs that a woman is going into labor too soon.
The normal length of a pregnancy is 40 weeks, while babies born before 37 weeks gestation are considered to be preterm. By detecting preterm contractions with greater accuracy and sensitivity than existing tools, the new system could allow doctors to take steps at an earlier stage to prevent premature births, its inventors say.
The health concerns and costs associated with premature births have received increasing attention in recent years, due in part to a rise in the number of multiple births, to the use of fertility treatments, which can cause multiple births, and to an increase in women who are having babies later in life. These trends are all associated with a higher risk of preterm labor.
It seems like just yesterday I was posting that there was little to no info about the causes of Gestational Diabetes. Today, it seems like there may be a tiny bit more. A new study shows that women with Gestational Diabetes have lower levels of the chemical Serotonin. Serotonin is made from tryptophan, an amino acid found in high protein foods.
So does this mean that women who eat more protein in the first trimester are less likely to get Gestational Diabetes?
The study shows what is described as “a clear link between the amount and type of protein consumed by the mother early in pregnancy and the generation of islet cells needed to protect her against gestational diabetes late in pregnancy”.
The largest study yet to investigate exposure to polybrominated diphenyl ether (PBDE) flame retardants and pregnant women’s thyroid hormone levels correlates exposure to PBDEs with reduced levels of thyroid-stimulating hormone (TSH) and increased odds of subclinical hyperthyroidism.
“There is very clear evidence from animal studies that PBDEs affect thyroid hormones, but very few human studies have attempted to determine whether pregnant women’s PBDE levels can impact the developing fetus,” says the study’s lead author, Jonathan Chevrier of the University of California, Berkeley, Center for Children’s Environmental Health Research.
“A mother’s thyroid hormones affect her developing baby throughout her pregnancy, and they are essential for fetal brain development,” says coauthor Brenda Eskenazi, director of the Center for Children’s Environmental Health Research.
An international group of researchers has identified the genetic cause of an inherited condition that causes severe foetal abnormalities.
The work, co-led by geneticists at the University of Leeds, together with colleagues from institutes and universities in Paris, Rome and San Diego, should allow couples at risk of conceiving babies with the profoundly disabling Meckel-Gruber and Joubert syndromes to be identified beforehand through genetic screening.
Their findings, which show how the disease gene stops cells’ finger-like antennae or ‘cilia’ from detecting and relaying information, may ultimately lead to treatments for more common related disorders, such as spina bifida and polycystic kidney disease. The paper is published in Nature Genetics today.
Nearly 1.4 million babies born in the United States in 2007 were delivered by Caesarean section, a record U.S. high and a larger number than in most other industrialized nations, health officials said on Tuesday.
In 2007, nearly one-third of all births were Caesarean deliveries, the U.S. Centers for Disease Control and Prevention said in a report, noting large rises in all racial, ethnic and age groups over 10 years.
The benefits and risks of Caesarean delivery, which involves major abdominal surgery, have been the subject of intense debate for more than a quarter of a century.
Women who gain weight too quickly during the first three months of pregnancy are more prone to develop pregnancy-related diabetes, new research shows.
“We found the association was stronger among women who were overweight at the start of pregnancy,” Dr. Monique M. Hedderson of Kaiser Permanente Medical Group in Oakland, California, noted in an email to Reuters Health.
This study, she added, suggests that weight gain in early pregnancy may be a modifiable risk factor for pregnancy-related, or “gestational,” diabetes.
Genes in the mother and the fetus play a role in the risk of preterm labor, a leading cause of infant death and disability, U.S. government researchers said on Thursday.
They said gene variants in the mother and fetus can make them susceptible to an inflammatory response to infections inside the uterus, raising the risk that a baby will be born early - before 37 weeks of gestation.
A preterm baby has a 120 times greater risk of death than a baby born full term, and survivors are at risk of breathing difficulties, bleeding into the brain, and having a significant neurologic handicap such as cerebral palsy.
Research published this week in PLoS Medicine concludes that at least 125.2 million women at risk of malaria become pregnant each year.
Most malaria deaths are caused by Plasmodium falciparum, which thrives in tropical and sub-tropical regions. But the most widespread type of malaria is P. vivax malaria, which also occurs in temperate regions. Most malaria deaths are among young children in sub-Saharan Africa but pregnant women and their unborn babies are highly vulnerable to malaria. About 10,000 women and 200,000 babies die annually because of malaria in pregnancy, which can cause miscarriages, preterm births, and low-birth-weight births. Estimates on the burden of malaria were previously only available for Africa.
The researchers estimated the sizes of populations at risk of malaria in 2007 by combining maps of the global limits of P. vivax and P. falciparum transmission with data on population densities. They used data from various sources to calculate the annual number of pregnancies (the sum of live births, induced abortions, miscarriages and still births) in each country.