Prenatal Screening Timeline

Need help choosing which test is right for you?
 Options for testing during Pregnancy, week by  week recommendations 

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Conception
Conception takes place in the fallopian tubes shortly after you ovulate. It takes about 24 hours for a sperm to fertilize the egg.
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Pregnancy Test
It is generally recommended that you wait until the first day of your missed period to take a pregnancy test.
Amniocentesis
Amniocentesis is a diagnostic test, performed by sampling the amniotic fluid, that can identify genetic disorders and open neural tube defects.
CVS
Chorionic villus sampling (CVS) is a diagnostic test, performed by sampling the chorionic villi, that can identify chromosome abnormalities and other genetic disorders.
First Trimester: 1-13 Weeks
Second Trimester: 14-26 Weeks
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First Trimester Screen | FßSM
First Trimester Screen | FßSM

Performed between 9 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and Trisomy 13.

Maternal Fetal Screen | T1®
Maternal Fetal Screen | T1®

Performed between 10 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, Trisomy 13, and early onset preeclampsia.

Preeclampsia Screening from NTD Eurofins: Preeclampsia Screen | T1SM
Preeclampsia Screening from NTD Eurofins: Preeclampsia Screen | T1SM

Performed between 10 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for early onset preeclampsia.

Non-Invasive Prenatal Screen
Non-Invasive Prenatal Screen

Performed any time after 10 weeks of pregnancy. Screens for all chromosome aneuploidies (including Down syndrome, Trisomy 18, Trisomy 13, and sex chromosome disorders) and six microdeletion syndromes.

Non-Invasive Prenatal Screenicon_arrow-right
Non-Invasive Prenatal Screen

Performed any time after 10 weeks of pregnancy. Screens for all chromosome aneuploidies (including Down syndrome, Trisomy 18, Trisomy 13, and sex chromosome disorders) and six microdeletion syndromes.

Sequential Screen | FßSM
Sequential Screen | FßSM

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and open neural tube defects. Can only be performed if First Trimester Screen | Fß was previously sent to NTD.

Quad Screen | FßSM
Quad Screen | FßSM

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and open neural tube defects.

AFP TestSM (for ONTDs)
AFP TestSM (for ONTDs)

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for open neural tube defects.

Zika Virus Real-Time RT-PCRicon_arrow-right
Zika Virus Real-Time RT-PCR

Performed any time before or during pregnancy. Screens for exposure to the Zika virus.

Genetic Carrier Screeningicon_arrow-right
Genetic Carrier Screening

Performed any time before or during pregnancy. Multiple test options that screen for autosomal recessive and x-linked genetic disorders.

First Trimester: 1-13 Weeks
First Trimester Screen | FßSM
First Trimester Screen | FßSM

Performed between 9 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and Trisomy 13.

Maternal Fetal Screen | T1®
Maternal Fetal Screen | T1®

Performed between 10 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, Trisomy 13, and early onset preeclampsia.

Preeclampsia Screening from NTD Eurofins: Preeclampsia Screen | T1SM
Preeclampsia Screening from NTD Eurofins: Preeclampsia Screen | T1SM

Performed between 10 weeks, 0 days to 13 weeks, 6 days of pregnancy. Screens for early onset preeclampsia.

Non-Invasive Prenatal Screen
Non-Invasive Prenatal Screen

Performed any time after 10 weeks of pregnancy. Screens for all chromosome aneuploidies (including Down syndrome, Trisomy 18, Trisomy 13, and sex chromosome disorders) and six microdeletion syndromes.

Second Trimester: 14-26 Weeks
Non-Invasive Prenatal Screenicon_arrow-right
Non-Invasive Prenatal Screen

Performed any time after 10 weeks of pregnancy. Screens for all chromosome aneuploidies (including Down syndrome, Trisomy 18, Trisomy 13, and sex chromosome disorders) and six microdeletion syndromes.

Sequential Screen | FßSM
Sequential Screen | FßSM

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and open neural tube defects. Can only be performed if First Trimester Screen | Fß was previously sent to NTD.

Quad Screen | FßSM
Quad Screen | FßSM

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for Down syndrome, Trisomy 18, and open neural tube defects.

AFP TestSM (for ONTDs)
AFP TestSM (for ONTDs)

Performed between 15 weeks, 0 days to 21 weeks, 6 days of pregnancy. Screens for open neural tube defects.

Ongoing Tests
Zika Virus Real-Time RT-PCRicon_arrow-right
Zika Virus Real-Time RT-PCR

Performed any time before or during pregnancy. Screens for exposure to the Zika virus.

Genetic Carrier Screeningicon_arrow-right
Genetic Carrier Screening

Performed any time before or during pregnancy. Multiple test options that screen for autosomal recessive and x-linked genetic disorders.

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