Obstetriskt ultraljud och prenatal diagnostik i första trimestern - Tidig upptäckt av kromosomavvikelser, missbildningar och graviditetskomplikationer ger fördelar.

Prenatal first trimester fetal diagnosis in Sweden today and in the future The combined first trimester test for detection of trisomy 21 has been available in Sweden the last 10 years but the uptake among pregnant women is still less than 50% and varies largely between different regions. The non-invasive prenatal test (NIPT) has been introduced and is currently recommended to be used as a secondary test only in those women who have an increased risk following the combined test. With falling costs for NIPT and a general offer of this test as a primary screening tool to all women there is concern that the first trimester ultrasound scan will be abandoned. There are however many arguments for retaining the scan and use this examination to clarify unclear NIPT results, detect major structural malformations, date pregnancies, determine chorionicity in twins and predict and treat preeclampsia already in the first trimester.