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Committee Opinion Number 682, December 2016

(Replaces Committee Opinion Number 581, December 2013)

ABSTRACT: Genetic technology has advanced dramatically in the past few decades, and its applications and use in caring for and counseling pregnant women has been transformational in the realm of prenatal diagnosis. Two of the newer genetic technologies in the prenatal setting are chromosomal microarray and whole-exome sequencing. Chromosomal microarray analysis is a method of measuring gains and losses of DNA throughout the human genome. It can identify chromosomal aneuploidy and other large changes in the structure of chromosomes as well as submicroscopic abnormalities that are too small to ...


2.
December 2015

Committee Opinion Number 648, December 2015

(Replaces Committee Opinion Number 399, February 2008)

ABSTRACT: Once considered a waste product that was discarded with the placenta, umbilical cord blood is now known to contain potentially life-saving hematopoietic stem cells. When used in hematopoietic stem cell transplantation, umbilical cord blood offers several distinct advantages over bone marrow or peripheral stem cells. However, umbilical cord blood collection is not part of routine obstetric care and is not medically indicated. Umbilical cord blood collection should not compromise obstetric or neonatal care or alter routine practice for the timing of umbilical cord clamping. If a patie...


Committee Opinion Number 643, October 2015

Reaffirmed 2017

ABSTRACT: Advances in the understanding of genetic conditions, reproductive technologies, and improved medical and surgical care have enabled an increasing number of women with genetic conditions to achieve a normal pregnancy outcome. However, management of certain genetic conditions during pregnancy is complex and may require a multidisciplinary approach from preconception through the postpartum period. Patients with certain genetic conditions, or those at risk of having a particular genetic condition, should have a preconception evaluation with their obstetrician–gynecologists, genetics spe...


Committee Opinion Number 640, September 2015

(This Committee Opinion Replaces Committee Opinion Number 545)

ABSTRACT: Noninvasive prenatal screening that uses cell-free DNA from the plasma of pregnant women offers tremendous potential as a screening method for fetal aneuploidy. A number of laboratories have validated different techniques for the use of cell-free DNA as a screening test for fetal aneuploidy. All tests have a high sensitivity and specificity for trisomy 18 and trisomy 21, regardless of which molecular technique is used. Women whose results are not reported, indeterminate, or uninterpretable (a “no call” test result) from cell-free DNA screening should receive further genetic counseli...


Committee Opinion Number 636, June 2015

(Replaces Committee Opinion Number 449, December 2009) Reaffirmed 2017

ABSTRACT: Phenylketonuria (PKU) is an autosomal recessive disorder of phenylalanine (Phe) metabolism characterized by deficient activity of the hepatic enzyme, phenylalanine hydroxylase. Increased blood Phe levels are toxic to a variety of tissues, particularly the developing fetal brain. The mainstay of treatment for PKU is the dietary restriction of Phe, which results in decreased blood Phe levels. Lifelong dietary restriction and therapy improves quality of life in patients with PKU and should be encouraged. Genetic counseling is recommended for all reproductive-aged women with PKU, and sh...


Committee Opinion Number 550, January 2013

(Reaffirmed 2016)

ABSTRACT: Myelomeningocele, the most severe form of spina bifida, occurs in approximately 1 in 1,500 births in the United States. Fetuses in whom myelomeningocele is diagnosed typically are delivered at term and are treated in the early neonatal period. A recent randomized controlled trial found that fetal surgery for myelomeningocele improved a number of important outcomes, but also was associated with maternal and fetal risks. Maternal–fetal surgery is a major procedure for the woman and her fetus, and it has significant implications and complications that occur acutely, postoperatively, fo...


Committee Opinion Number 527, June 2012

(Reaffirmed 2016)

ABSTRACT: Advances in genetic technologies have led to the identification of hundreds of single nucleotide polymorphisms that are associated with a variety of complex diseases, including cancer, diabetes, cardiovascular disease, and Alzheimer disease. Although personalized genomic tests that provide information regarding the risk of development of multiple diseases may be important tools in the near future, their use is not recommended outside of a clinical trial until these tests are validated as clinically useful in appropriately designed prospective studies. Testing for single-gene disorde...


Committee Opinion Number 478, March 2011

(Reaffirmed 2015)

ABSTRACT: Family history plays a critical role in assessing the risk of inherited medical conditions and single gene disorders. Several methods have been established to obtain family medical histories, including the family history questionnaire or checklist and the pedigree. The screening tool selected should be tailored to the practice setting and patient population. It is recommended that all women receive a family history evaluation as a screening tool for inherited risk. Family history information should be reviewed and updated regularly, especially when there are significant changes to f...


Committee Opinion Number 410, June 2008

(Reaffirmed 2014)

ABSTRACT: Genetic testing is poised to play an increasing role in the practice of obstetrics and gynecology. To assure patients of the highest quality of care, physicians should become familiar with the currently available array of genetic tests and the tests' limitations. Clinicians should be able to identify patients within their practices who are candidates for genetic testing. Candidates will include patients who are pregnant or considering pregnancy and are at risk for giving birth to affected children as well as gynecology patients who, for example, may have or be predisposed to certain...


Committee Opinion Number 409, June 2008

Reaffirmed 2016

ABSTRACT: Marketing of genetic testing, although similar to direct-to-consumer advertising of prescription drugs, raises additional concerns and considerations. These include issues of limited knowledge among patients and health care providers of available genetic tests, difficulty in interpretation of genetic testing results, lack of federal oversight of companies offering genetic testing, and issues of privacy and confidentiality. Until all of these considerations are addressed, direct or home genetic testing should be discouraged because of the potential harm of a misinterpreted or inaccur...


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