title: Correlation between missed abortion and insertional translocation involving chromosomes 1 and 7.
abstract: BACKGROUND
  Missed abortion (Silent miscarriage) is defined as intrauterine fetal death before twenty weeks gestation. One of the most common causes of early missed abortions (before 10 weeks gestation) is cytogenetic abnormalities.
  
  
  OBJECTIVE
  To asses if there is a correlation between chromosomal aberrations (especially in chromosome 7) and missed abortion among at least two generations.
  
  
  METHODS
  After exclusion of direct causes of missed abortion, this study included 60 women (the study group) who had first trimestric missed abortion and 30 healthy women who did not suffer from any diseases during their pregnancy and had apparently normal outcome (the control group). All cases were diagnosed; the blood and tissue samples were collected from the mothers and abortuses from the Department of Obstetrics and Gynecology, Maternity Hospital, Ain Shams University. Cytogenetic analyses were performed by using conventional technique and G/T banding techniques and Fluorescence In Situ Hybridization (FISH) analysis with a whole chromosome 7 painting probe (WCP7) and a 7q subterminal probe (7q36, qter), prepared by chromosome micro dissection technique was used for confirming the specific chromosomal abnormality.
  
  
  RESULTS
  <insertional translocation between chromosomes 1 and 7 (46, XX, ins. (1; 7) (p32; q32.35). This insertion has appeared in two families and among two generations, and in one family among three generations.
  
  
  CONCLUSIONS
  Chromosome 7 insertional translocation is a possible autosomal dominant inherited trait and may cause missed abortion.
authors.affiliation: Department of Zoology, Faculty of Women for Arts, Science and Education, Ain Shams University, Cairo, Egypt.
authors.forename: Neveen
authors.initials: N
authors.lastname: Ashaat
authors.affiliation: Department of Obstetrics and Gynecology, Maternity Hospital, Ain Shams University, Cairo, Egypt.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Husseiny
keywords: Fluorescence In Situ Hybridization; Maternal chromosomal aberrations; Missed abortion