prenatal diagnosis

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Related to Fetal testing: prenatal diagnosis

pre·na·tal di·ag·no·sis

diagnosis using procedures available for the recognition of diseases and malformations in utero, and the conclusion reached.
Synonym(s): antenatal diagnosis

prenatal diagnosis

any of various diagnostic techniques to determine whether a developing fetus is affected with a genetic disorder or other abnormality. Such procedures as radiographic examination and ultrasound scanning can be used to follow fetal growth and detect structural abnormalities; amniocentesis enables fetal cells to be obtained from the amniotic fluid for culture and biochemical assay for detection of metabolic disorders and chromosomal analysis; fetoscopy enables fetal blood to be withdrawn from a blood vessel of the placenta and examined for disorders such as thalassemia, sickle cell anemia, and Duchenne's muscular dystrophy. If any of the test results are positive and the child is likely to be born with a severe defect or disease, the parents need support and advice from genetic counselors on whether to terminate the pregnancy. If the parents decide to have the baby, the nurse can help educate them about the specific disorder and prepare them for the special care required of a handicapped or genetically defective child. Also called antenatal diagnosis. See also chorionic villus sampling, genetic counseling, genetic screening.

prenatal diagnosis

Obstetrics The examination of fetal cells taken from the amniotic fluid, the primitive placenta–chorion, or umbilical cord for biochemical, chromosomal, or gene defects

pre·na·tal di·ag·no·sis

(prē-nā'tăl dī'ăg-nō'sis)
Diagnosis using procedures available for the recognition of diseases and malformations in utero, and the conclusion reached.

Prenatal diagnosis

The determination of whether a fetus possesses a disease or disorder while it is still in the womb.
References in periodicals archive ?
We need to remember that diabetes in pregnancy is a chronic disease that is extremely demanding, requiring frequent blood glucose tests throughout the day, insulin injections or ingestion of oral hypoglycemic agents, frequent fetal testing, and adherence to a diet protocol.
For patients who opt for expectant management, whose blood pressure is adequately controlled, and whose fetal testing is reassuring after the 24-hour observation period, we advise discontinuing magnesium sulfate and monitoring them closely on the antepartum high-risk ward until the end of the 33rd week of gestation is reached, or until there is a change in their condition that mandates delivery.
If severe oligohydramnios (an amniotic fluid index of less than 5 cm on at least two occasions 24 or more hours apart) is detected and the fetus has a gestational age of more than 30 weeks, then the mother should be delivered regardless of other fetal testing results.
It is too early to say if integrated fetal testing should become the standard for determining delivery timing in intrauterine growth restriction (IUGR), although the University of Maryland Medical Center has been using the method for the past 7 years.
I recommend managing these patients as an inpatient with daily fetal testing.
If the amniotic fluid index is less than 5 before 34 weeks or absent end-diastolic flow is identified on Doppler, fetal testing is increased to daily.
There have been two randomized controlled trials comparing the effects of monitoring, fetal testing, and induction on perinatal mortality and morbidity in postdate pregnancies.
In 1992, a study of 3,407 pregnancies showed a lower C-section rate in an induction group, compared with a fetal testing group (21% vs.