Fetal RHD Screening in RH1 Negative Pregnant Women: Experience in Switzerland.
Details
Serval ID
serval:BIB_E59032A7A5C6
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fetal RHD Screening in RH1 Negative Pregnant Women: Experience in Switzerland.
Journal
Biomedicines
ISSN
2227-9059 (Print)
ISSN-L
2227-9059
Publication state
Published
Issued date
27/09/2023
Peer-reviewed
Oui
Volume
11
Number
10
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Publication Status: epublish
Abstract
RH1 incompatibility between mother and fetus can cause hemolytic disease of the fetus and newborn. In Switzerland, fetal RHD genotyping from maternal blood has been recommended from gestational age 18 onwards since the year 2020. This facilitates tailored administration of RH immunoglobulin (RHIG) only to RH1 negative women carrying a RH1 positive fetus. Data from 30 months of noninvasive fetal RHD screening is presented. Cell-free DNA was extracted from 7192 plasma samples using a commercial kit, followed by an in-house qPCR to detect RHD exons 5 and 7, in addition to an amplification control. Valid results were obtained from 7072 samples, with 4515 (64%) fetuses typed RHD positive and 2556 (36%) fetuses being RHD negative. A total of 120 samples led to inconclusive results due to the presence of maternal or fetal RHD variants (46%), followed by women being serologically RH1 positive (37%), and technical issues (17%). One sample was typed false positive, possibly due to contamination. No false negative results were observed. We show that unnecessary administration of RHIG can be avoided for more than one third of RH1 negative pregnant women in Switzerland. This reduces the risks of exposure to a blood-derived product and conserves this limited resource to women in actual need.
Keywords
RH immunoglobulin prophylaxis, RH1 incompatibility, cell-free fetal DNA, hemolytic disease of the fetus and newborn (HDFN), noninvasive prenatal diagnosis
Pubmed
Web of science
Open Access
Yes
Create date
06/11/2023 13:34
Last modification date
08/08/2024 6:41