Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Infant mortality linked to subsequent risk of stillbirth finds new US study

21.09.2011
Women whose first pregnancy ended in infant death are significantly more likely to have a subsequent stillbirth finds new research published today (21 September) in BJOG: An International Journal of Obstetrics and Gynaecology.

Black women experienced the highest rates of stillbirth in subsequent pregnancy, the study by US researchers from the University of South Florida and the University of Rochester found.

Infant mortality accounts for an estimated 5.75 million deaths annually worldwide and it is estimated there are 3.2 to 3.3 million stillbirths annually worldwide.

This new study looked at 320,350 women who had two singleton pregnancies between 1989 and 2005. Of these, 2,483 women (0.78%) had experienced infant death in the first pregnancy, while the remaining 317,867 women had an infant in their first pregnancy who survived the first year of life.

Within the study population, 1,347 cases of stillbirth occurred during the second pregnancy, representing a stillbirth rate of 4.2 per 1,000.

Mothers with previous infant death (defined as death of a child within the first year of life) were compared to those whose infant survived their first year.

Adjusted hazard ratios (AHR) were generated to assess the association between infant mortality in the first pregnancy and stillbirth in the second pregnancy.

The study found that overall women with prior infant death were three times as likely to experience stillbirth in their subsequent pregnancy (AHR=2.91).

White women with previous infant death were nearly twice as likely to experience subsequent stillbirth, compared to white women with prior infant survival (AHR=1.96). Black women with previous infant death were more than four times as likely to experience subsequent stillbirth, compared to their black counterparts (AHR=4.28).

The risk of stillbirth among women with and without a history of infant death, neonatal death, and post-neonatal death by race was also reviewed and the researchers found that black women had the highest rates of stillbirth in subsequent pregnancy. Looking specifically at neonatal death, black women were more than nine times as likely to experience stillbirth as white women (AHR=9.46).

The study also found that women with infant death in the first pregnancy were more likely to be black, obese, and smoke during pregnancy.

When comparing birth weight of infants associated with the second pregnancy, infants born to mothers with prior infant death were, on average, 293 grams smaller than those born to mothers whose previous infant survived their first year of life.

In addition, pregnancy complications were almost twice as frequent among mothers who experienced infant death during their first pregnancy, as compared to those whose infants survived their first year of life (10.91% versus 6.66%).

Dr Hamisu Salihu, Professor in the Department of Epidemiology & Biostatistics, University of South Florida, College of Public Health and principal investigator said:

"Our findings show that there are large disparities in infant mortality rates between white and black women and highlight the need for improved public health efforts to reduce infant mortality.

"It is important that clinicians note the potential risk for subsequent stillbirth following infant mortality when they speak with patients in the period preceding their next pregnancy."

Professor Philip Steer, BJOG Editor-in-Chief said:

"Stillbirth and infant death are a terrible loss and traumatic for any mother and family. Women with a previous infant death need additional support and advice concerning any subsequent pregnancies.

"Obesity and smoking in pregnancy are known risk factors for stillbirth and advice needs to be centred on pre-conception health so a woman can be as healthy as possible before, during and after pregnancy."

Amy Molnar | EurekAlert!
Further information:
http://www.wiley.com

More articles from Studies and Analyses:

nachricht Amputees can learn to control a robotic arm with their minds
28.11.2017 | University of Chicago Medical Center

nachricht The importance of biodiversity in forests could increase due to climate change
17.11.2017 | Deutsches Zentrum für integrative Biodiversitätsforschung (iDiv) Halle-Jena-Leipzig

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Long-lived storage of a photonic qubit for worldwide teleportation

MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.

Concerning the development of quantum memories for the realization of global quantum networks, scientists of the Quantum Dynamics Division led by Professor...

Im Focus: Electromagnetic water cloak eliminates drag and wake

Detailed calculations show water cloaks are feasible with today's technology

Researchers have developed a water cloaking concept based on electromagnetic forces that could eliminate an object's wake, greatly reducing its drag while...

Im Focus: Scientists channel graphene to understand filtration and ion transport into cells

Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.

To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...

Im Focus: Towards data storage at the single molecule level

The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.

Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...

Im Focus: Successful Mechanical Testing of Nanowires

With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong

Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

See, understand and experience the work of the future

11.12.2017 | Event News

Innovative strategies to tackle parasitic worms

08.12.2017 | Event News

AKL’18: The opportunities and challenges of digitalization in the laser industry

07.12.2017 | Event News

 
Latest News

A whole-body approach to understanding chemosensory cells

13.12.2017 | Health and Medicine

Water without windows: Capturing water vapor inside an electron microscope

13.12.2017 | Physics and Astronomy

Cellular Self-Digestion Process Triggers Autoimmune Disease

13.12.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>