title: Characteristics of chromosomal abnormalities diagnosed after spontaneous abortions in an infertile population.
abstract: OBJECTIVE
  To estimate the prevalence of chromosomally abnormal related miscarriages in an infertile population.
  
  
  METHODS
  Retrospective analysis of cytogenetics obtained by chorionic villi harvesting of the first miscarriage cycle of infertile patients at our center from 2001-2010 were reviewed. Abnormal results were characterized as trisomy, monosomy X, structural, or other. Age, # of eggs, #2PN, # embryos transferred, day of transfer, and performance of intracytoplasmic sperm injection (ICSI) were recorded.
  
  
  RESULTS
  In a study population of 299 patients with a mean age of 38.0 ± 4.5 y, 276(92 %) patients had some form of assisted reproductive technologies (ART), and 244(82 %) had IVF. Of all results, 71.6 % had an abnormal karyotype. Patients with abnormal cytogenetics were older (38.6 ± 4.1 vs. 36.3 ± 4.9, p < 0.001), and more likely to have a day 3 transfer (age < 38 ( 20.7 %) vs. age 38 (46.3 %), p = <0.001) with more embryos transferred (3.0 ± 1.2, vs. 2.3 ± 0.9, p < 0.001). The performance of ICSI did not affect the rate of cytogenetically abnormal products of conception (ICSI 68.3 % vs. no ICSI 70.7 %). In comparing patients, monosomy X was more common in <38 y. Rates of trisomy, although not statistically significant, were higher in older patients.
  
  
  CONCLUSIONS
  The classic associations between advancing age and chromosomal abnormalities, and younger age and monosomy X, are affirmed in our infertile population. There was no increase in chromosomal abnormalities in cycles where ICSI was performed. Older patients are more likely to have day 3 transfers and more embryos transferred. Our chromosomal abnormality rates are higher than classic estimates but comparable to recent studies. The limitation of this study was a lack in uniformity among practitioners in recommending all patients have a Dilation and Curettage (D&C) at time of diagnosis. Such information may serve to improve the counseling of patients after miscarriage.
authors.affiliation: Department of Obstetrics and Gynecology, NYU School of Medicine, NY, NY 10016, USA. rinaldma@gmail.com
authors.forename: Marie
authors.initials: M
authors.lastname: Werner
authors.forename: Andrea
authors.initials: A
authors.lastname: Reh
authors.forename: Jamie
authors.initials: J
authors.lastname: Grifo
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Perle
mesh_terms: D059786:Abnormal Karyotype; D000022:Abortion, Spontaneous / Q000235:genetics*; D000328:Adult; D000367:Age Factors; D002824:Chorionic Villi / Q000378:metabolism / Q000473:pathology; D002869:Chromosome Aberrations; D002877:Chromosomes, Human / Q000235:genetics / Q000378:metabolism; D002970:Cleavage Stage, Ovum / Q000378:metabolism; D004624:Embryo Transfer / Q000379:methods; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods; D006801:Humans; D007247:Infertility, Female / Q000235:genetics*; D011247:Pregnancy; D015995:Prevalence; D012189:Retrospective Studies; D012307:Risk Factors; D020554:Sperm Injections, Intracytoplasmic / Q000379:methods