First Trimester Maternal Screen, SerumPrint this page
Updated Test Information:
First Trimester Maternal Screen, Serum
First Trimester Maternal Screen; Combined Screen; First Trimester Screen; Ultrascreen
Approval to send specimen for first-trimester screening is required and may take up to 5 business days to complete. Nuchal translucency (NT) measurements are only accepted from NT-certified sonographers. Do not send specimen to Mayo Clinic Laboratories if the sonographer is not NT-certified or before completing the application process. See "Additional Information".
|Unacceptable Specimen Conditions||
Upon receiving maternal serum screening results, all information used in the risk calculation should be reviewed for accuracy (eg, maternal date of birth, demographics, sonographic information). If any information is incorrect, the laboratory should be contacted for a recalculation of the estimated risks.
A screen-negative result does not guarantee the absence of fetal defects. A screen-positive result does not provide a diagnosis but indicates that further diagnostic testing should be considered (an unaffected fetus may have screen- positive result for unknown reasons).
Variables Affecting Marker Levels:
|Minimum Sample Volume||
A numeric risk for trisomy 18 risk is provided with positive results on non-diabetic, non-twin pregnancies.
43995-0, 50679-0, 43995-0, 49090-4, 43994-3, 48407-1, 76348-2, 32166-1, 32166-1, 49035-9, 49035-9, 49035-9, 49035-9, 49588-7, 80615-8, 48767-8, 33882-2, 21112-8, 43993-5, 29463-7, 29463-7, 44877-9, 21484-1, 64234-8, 34970-4, 11957-8, 11957-8, 11888-5, 552