title: Cell-free fetal DNA in the cerebrospinal fluid of women during the peripartum period.
abstract: OBJECTIVE
  The purpose of this study was to determine whether cell-free fetal DNA is detectable in the cerebrospinal fluid of women during pregnancy and after delivery.
  
  
  METHODS
  Cerebrospinal fluid was collected from 39 women who underwent an indicated spinal anesthesia procedure. Twenty-six samples were from women who carried at least 1 male fetus, and 13 samples were from women with only a female fetus. DNA was analyzed with the use of real-time polymerase chain reaction for DYS-1 (which represented male fetal DNA) and beta-globin (which represented maternal and fetal DNA).
  
  
  RESULTS
  beta-Globin DNA was detected in all cerebrospinal samples. DYS-1 gene sequences were detected in 4 cerebrospinal fluid samples from women who had male fetuses (2 samples were from women who underwent cesarean delivery of singleton pregnancies, 1 sample was from a triplet pregnancy, and 1 sample was from a woman after delivery). No male DNA was detected in the cerebrospinal fluid of women who carried female fetuses.
  
  
  CONCLUSIONS
  Male fetal cells and/or cell-free fetal DNA is detectable in the cerebrospinal fluid of some pregnant women or some women after delivery.
authors.affiliation: Division of Genetics Medicine, Department of Pediatrics, Tufts-New England Medical Center, Boston, MA 02111, USA.
authors.forename: Robert M
authors.initials: RM
authors.lastname: Angert
authors.forename: Erik S
authors.initials: ES
authors.lastname: Leshane
authors.forename: Ralph W
authors.initials: RW
authors.lastname: Yarnell
authors.forename: Kirby L
authors.initials: KL
authors.lastname: Johnson
authors.forename: Diana W
authors.initials: DW
authors.lastname: Bianchi
mesh_terms: D002555:Cerebrospinal Fluid / Q000737:chemistry; D004247:DNA / Q000134:cerebrospinal fluid*; D036861:Delivery, Obstetric; D005260:Female; D005333:Fetus / Q000378:metabolism*; D005914:Globins / Q000235:genetics; D006801:Humans; D008297:Male; D016133:Polymerase Chain Reaction; D011247:Pregnancy / Q000134:cerebrospinal fluid*
chemical_list: D005914:Globins; D004247:DNA