Contribución de las anomalías cromosómicas ovocitarias en el fracaso de la fecundación humana in vitro / Contribution of chromosomal abnormalities to in vitro fertilization failures
Rev. méd. Chile
; 126(5): 511-9, mayo 1998. ilus, tab
Article
em Es
| LILACS
| ID: lil-216435
Biblioteca responsável:
CL1.1
RESUMO
Background:
Present knowledge of mechanisms involved in human fertilization has uncovered a new group of pathologic conditions that have been generically named fertilization abnormalities.Aim:
To determine the contribution of chromosomal alterations to in vitro fertilization failures. Material andmethods:
A cytogenetic analysis of oocytes that were not fertilized after insemination with normal spermatozoa. Oocytes were obtained from patients subjected to in vitro fertilization in a public hospital of Metropolitan Santiago. Ovulation was induced in these patients administering GnRh-a, FSH, HMG and HCG. The double fixation technique described by Wramsby was used to obtain chromosomes.Results:
One hundred and seven oocytes coming from 45 women aged 25 to 42 years old were studied. The frequency of aneuploidy in these oocytes was 37.3 percent, with a 11.8 percent of hypohaploidy, a 21.6 percent of hyperhaploidy and a 3.9 percent of diploid oocytes. In hyperhaploid as well as in hypohaploid oocytes, the chromosomes involved in aneuploidy pertained to groups D and G.Conclusions:
Although the total frequency of aneuploidy is within normal ranges, the frequency of hyperhaploidy is superior to previous reports. An explanation for this finding could be that the occurrence of a lack of disjunction with chromosomal retention in the parental cell occurs with a higher frequency than that in which the chromosomes are retained in the polocyte. We also suggest that oocyte chromosomal aneuploidy could contribute to the failure of in vitro fertilization procedures (
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Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Oócitos
/
Fertilização in vitro
/
Aberrações Cromossômicas
/
Citogenética
Limite:
Adult
/
Female
/
Humans
Idioma:
Es
Revista:
Rev. méd. Chile
Assunto da revista:
MEDICINA
Ano de publicação:
1998
Tipo de documento:
Article
/
Project document
País de publicação:
Chile