Navigation Links
Researchers can predict accurately the outcome of pregnancies threatening to miscarry
Date:7/5/2011

"However, at present we have no way of predicting which threatened miscarriages will result in the end of the pregnancy and so we are unable to target attempts to rescue the pregnancy at the right women or to offer them counselling," she said. "This has led to wasteful and potentially harmful interventions, including unnecessary blood tests, ultrasound scans, hospital admissions for bed rest, sexual abstinence, low dose aspirin and progesterone supplementation."

Between 2009-2010, Dr Adam and her colleagues followed 112 women with threatened miscarriages, who were between six and ten weeks pregnant. During the five weeks the women were in the study they had ultrasound scans, weekly charting of pain and bleeding and weekly tests to check the levels of progesterone and the pregnancy hormone, human chorionic gonadotrophin (hCG). After analysing data on the outcomes of these pregnancies, Dr Adam found there were six factors that had the most impact on the risk of miscarriage: a history of subfertility, levels of progesterone, levels of hCG, the length of the foetus, how much bleeding had occurred, and the gestational age of the baby.

Individually, these factors were unable to predict accurately the risk of miscarriage, but when the researchers combined two of these factors the amount of bleeding and levels of hCG to create a "Pregnancy Viability Index" (PVI), they found that this provided a consistently reliable means of predicting which pregnancies would miscarry.

"By the end of the study period, the PVI was able to accurately predict the pregnancy outcome in 94% of women who had ongoing pregnancies (its positive predictive value), and also predicted the outcome in 77% of women whose pregnancy ended in miscarriage (its negative predictive value)," said Dr Adam**. "This research has, for the first time, offered us a robust tool to begin to attempt to rescue pregnancies threatening to miscarry, when, currently, all we can do is fold our hands and hope for the best."

In addition, the PVI will enable doctors to avoid unnecessary interventions. "Every woman attending a unit with a threatened miscarriage has initial blood tests and a scan as part of her care. Additionally, some women are subjected to repeated blood tests and ultrasound scans to monitor the pregnancy. The use of the PVI will negate these in the vast majority (80%) of these women, as we will be able to reassure them of a high likelihood of pregnancy continuation and that there is little additional value in doing further testing. Furthermore, psychological counselling and support could be targeted at the women most likely to miscarry, in order to reduce anxiety levels and improve their overall experience," she said.

"The PVI will facilitate further investigations of the remaining 20% of these pregnancies that do go on to miscarry, and we are hopeful that by identifying factors that impact significantly on pregnancy outcome we will be able to gain a better understanding of the process of threatened miscarriage. This, in turn, may enable us to design more effective interventions to rescue these pregnancies.

"We were limited by the size of our study and feel that further enhancements can be made to the PVI in a larger definitive study in which we could include more of the six factors that we have found to be important in miscarriage."

Dr Adam and her colleagues are seeking funding to validate the PVI model in a larger research trial of 1000 women with threatened miscarriage."

No additional equipment is required in the clinic in order to use the PVI. "This is the huge attraction of the PVI. It lends itself to widespread adoption because it is simple, inexpensive and reproducible, without the need for sophisticated equipment or gadgets," said Dr Adam.


'/>"/>

Contact: Hanna Hanssen
hanna@eshre.eu
32-047-335-3381
European Society of Human Reproduction and Embryology
Source:Eurekalert

Related biology news :

1. NC State researchers get to root of parasite genome
2. Researchers find animal with ability to survive climate change
3. Researchers find an essential gene for forming ears of corn
4. Researchers note differences between people and animals on calorie restriction
5. Researchers study acoustic communication in deep-sea fish
6. Researchers discover that growing up too fast may mean dying young in honey bees
7. Researchers study how pistachios may improve heart health
8. UI researchers find potentially toxic substance present in Chicago air
9. Researchers develop new self-training gene prediction program for fungi
10. Case Western Reserve University researchers track Chernobyl fallout
11. Childrens National researchers develop novel anti-tumor vaccine
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/22/2016)... OTTAWA, Ontario , PROVO ... 2016 Newborn Screening Ontario (NSO), which operates ... for molecular testing, and Tute Genomics and ... process management technology respectively, today announced the launch of ... new next-generation sequencing (NGS) testing panel. ...
(Date:3/17/2016)... -- ABI Research, the leader in transformative technology ... will reach more than $30 billion by 2021, ... electronics, particularly smartphones, continue to boost the biometrics ... two billion shipments by 2021 at a 40% ... Analyst at ABI Research. "Surveillance is also gearing ...
(Date:3/14/2016)... March 14, 2016 NXTD ) ("NXT-ID" ... commerce market, announces the airing of a new series of ... week of March 21 st .  The commercials will air ... popular Squawk on the Street show. --> NXTD ... growing mobile commerce market, announces the airing of a new ...
Breaking Biology News(10 mins):
(Date:5/25/2016)... ... May 25, 2016 , ... ... became double board-certified in surgery and surgery of the hand by the National ... no stranger to going above and beyond in his pursuit of providing the ...
(Date:5/25/2016)... ... May 25, 2016 , ... Biohaven Pharmaceutical Holding Company Ltd. ... the company’s orphan drug designation request covering BHV-4157 for the treatment of Spinocerebellar ... FDA. , Spinocerebellar ataxia is a rare, debilitating neurodegenerative disorder that is ...
(Date:5/23/2016)... ... ... blood donations in South Texas and across the nation is growing. , But according to ... are on the decline. In fact, donations across the country are at their lowest point ... the last four years alone. , There is no substitute for blood. , “We want ...
(Date:5/23/2016)... North Carolina (PRWEB) , ... May 23, 2016 ... ... automation and building management solutions and services based in Aurora, Ohio, has broken ... of established business in the Research Triangle Park area, this new location solidifies ...
Breaking Biology Technology: