Screening Tests During Pregnancy

8/6/2019 Screening Tests During Pregnancy

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Screening Tests During Pregnancy

Health care providers and reliable medical sources, such as the March of Dimes and the U.S. Centers for Disease Control and Prevention, can help you understand the risks and benefits of each test.

Purpose Test name Why performed When performed

Who performed

on/Sample

Genetic tests for

inherited diseases

Genetic testing for inherited diseases

Check carrier status for certain genetic diseases

to determine risk of having a baby with such

a disease

Pre-conception or 1st Trimester

Mother and

father (bloodsample)

Genetic testing for

hemoglobindisorders

Check carrier status for certain hemoglobin

disorders to determinerisk of having a baby

with such a disease

Pre-conception or during pregnancy

Mother and

father (bloodsample)

Cystic fibrosis

carrier testing

Check carrier status for

CF

Pre-conception or

first trimester

Mother andfather (blood

sample)

Testing associated

with health conditions

of the mother that

affect pregnancy

Immunity to rubella

(German measles)

Check for immunity tothe virus, which can

cause birth defects

Pre-conception or

first trimester

Mother (blood

sample)

Human

immunodeficiencyvirus (HIV) antibody

test

Check for HIV infection

so steps can be taken toreduce likelihood of

transmission to the baby

Pre-conception or first trimester; may be repeated in third

trimester if at high

risk

Mother (bloodsample)

Gonorrhea,chlamydia, and

syphilis tests

Check for STD

infections, which cancause miscarriage or

infect the baby duringdelivery

Pre-conception or

first trimester; may be repeated in third

trimester if at highrisk

Mother (cervical

cells, urine or blood sample,

depending ontest)

Pap smear

Detect abnormal

cervical cells,inflammation, or STDs

Pre-conception or

first trimester

Mother (cells

from her cervicx)

Hepatitis Bscreening

Detect Hepatitis Binfection

Pre-conception or

first trimester; may be repeated in the

third trimester if athigh risk


Varicella zoster viral

testing

Check for immunity to

chicken pox, which cancause birth defects

Pre-conception or

first trimester

Mother (blood

sample)

TORCH panel Check for infection with Pre-conception or Mother (blood




Purpose Test name Why performed When performedWho performed

on/Sample

toxoplasmosis and other

infectious diseases thatcan cause birth defects

first trimester, if

infectionssuspected

sample)

Bacterial vaginosis

Detect infection, which

can cause pre-term labor and birth

Pre-conception or whenever

symptomsexperienced

Mother (vaginal

secretions)

Urine culture for bacteriuria

Detect bacterial

infection in the urinarytract, which can lead to

kidney infection or increased risk of pre-

term delivery and low birth weight

First prenatal visitor between 12 and

16 weeks of pregnancy; may be

repeated in thirdtrimester

Mother (urinesample)

Group Bstreptococcus

Detect infection, whichcan harm the baby

during birth and infectthe mother¶s uterus,

urinary tract, and anyincision made during a

cesarean section

Between weeks 35and 37 of

pregnancy

Mother

(specimen fromvaginal and

rectal areas)

Monitoring of

pregnancy

Pregnancy test Confirm pregnancy First trimester Mother (blood

sample)

Urine screen for sugar and/or protein

Check for signs of

kidney or bladder infection, gestational

diabetes, or preeclampsia

Each prenatal visitMother (urinesample)

Hemoglobin test Check for anemia

Pre-conception

and/or early in thefirst trimester;

repeated in thirdtrimester


Antibody screen

Check for potential

incompatibility in bloodtype between mother

and fetus (such as Rhfactor antibodies)

First trimester;repeated at week 28

of pregnancy


Glucose challenge

test/oral glucose

Check for gestational

diabetes

Between 24 and 28

weeks of pregnancy

Mother (blood

sample)




Purpose Test name Why performed When performedWho performed

on/Sample

tolerance test

Platelet count

Detect a low count or other platelet problem;

platelets are importantfor blood clotting in

case of bleeding duringdelivery

Third trimester Mother (bloodsample)

Detection of fetal

abnormalities or risk

First trimester Down

syndrome screen

Assess risk of carrying a

fetus with certainchromosomal

abnormalities, such asDown syndrome

Usually between 10weeks, 4 days and

13 weeks, 6 days of pregnancy

Mother (bloodsample plus

ultrasound)

Triple marker or

quad marker screen

Assess risk of carrying a

fetus with certainchromosomalabnormalities and open

neural tube defects

Between 15 and 20

weeks of pregnancy

Mother (blood

sample)

Chorionic villus

sampling

Detect chromosomal

disorders in the fetus


pregnancy, if recommended

Mother (cellsfrom the

placenta)

Amniocentesis

Detect certain birth

defects andchromosomal

abnormalities

Between 15 and 20

weeks of pregnancy, if

recommended

Mother (amniotic fluid)

Cordocentesis

Detect chromosomeabnormalities, blood

disorders, and certaininfections


pregnancy, if recommended

Mother/fetus(fetal blood

sample obtainedfrom vein in the

umbilical cord)

Fetalmaturity/readiness for

birth

Amniocentesis

Check fetal lungdevelopment

After week 32 of pregnancy if risk of

pre-term delivery

Mother (amniotic fluid)

Fetal fibronectin

(fFN)

Detect fFN, negativeresult is highly

predictive that pre-termdelivery will NOT occur

in the next 7-14 days

Between week 26and 34 of

pregnancy, if having symptoms

Mother (cervical

or vaginal fluidsample)

Documents

Screening Tests During Pregnancy