Differential Effect of Advanced Maternal Age on Prenatal Diagnosis of Trisomies 13, 18 and 21
Nondisjunction associated with advanced maternal age, a well-established factor in the etiology of autosomal trisomy, should equally affect all chromosomes. In this study we evaluate the association of advanced maternal age with the occurrence of potentially viable autosomal trisomies (13, 18 and 21...
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| Veröffentlicht in: | Fetal diagnosis and therapy 1999-05, Vol.14 (3), p.181-184 |
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| container_title | Fetal diagnosis and therapy |
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| creator | Drugan, Arie Yaron, Yuval Zamir, Ronit Ebrahim, Salah A.D. Johnson, Mark P. Evans, Mark I. |
| description | Nondisjunction associated with advanced maternal age, a well-established factor in the etiology of autosomal trisomy, should equally affect all chromosomes. In this study we evaluate the association of advanced maternal age with the occurrence of potentially viable autosomal trisomies (13, 18 and 21). 275 aneuploid pregnancies were ascertained prenatally and were grouped according to chromosome anomaly diagnosed. Mean maternal age was significantly younger (p = 0.009) in pregnancies affected by trisomy 13 than in pregnancies with trisomy 21. An intermediate mean maternal age was observed in pregnancies affected by trisomy 18. Our study shows a trend of the more severe, but potentially viable, autosomal trisomies to be diagnosed at younger maternal age. This may substantiate the ‘relaxed selection hypothesis’ proposed to explain the association of aneuploid conceptions with advanced maternal age. |
| doi_str_mv | 10.1159/000020915 |
| format | Article |
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In this study we evaluate the association of advanced maternal age with the occurrence of potentially viable autosomal trisomies (13, 18 and 21). 275 aneuploid pregnancies were ascertained prenatally and were grouped according to chromosome anomaly diagnosed. Mean maternal age was significantly younger (p = 0.009) in pregnancies affected by trisomy 13 than in pregnancies with trisomy 21. An intermediate mean maternal age was observed in pregnancies affected by trisomy 18. Our study shows a trend of the more severe, but potentially viable, autosomal trisomies to be diagnosed at younger maternal age. 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In this study we evaluate the association of advanced maternal age with the occurrence of potentially viable autosomal trisomies (13, 18 and 21). 275 aneuploid pregnancies were ascertained prenatally and were grouped according to chromosome anomaly diagnosed. Mean maternal age was significantly younger (p = 0.009) in pregnancies affected by trisomy 13 than in pregnancies with trisomy 21. An intermediate mean maternal age was observed in pregnancies affected by trisomy 18. Our study shows a trend of the more severe, but potentially viable, autosomal trisomies to be diagnosed at younger maternal age. 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| ispartof | Fetal diagnosis and therapy, 1999-05, Vol.14 (3), p.181-184 |
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| source | Karger Journal Archive Collection; MEDLINE; Karger Journals Complete; Alma/SFX Local Collection |
| subjects | Adult Biological and medical sciences Chromosomes, Human, 13-15 Chromosomes, Human, 16-18 Down Syndrome - diagnosis Female Gynecology. Andrology. Obstetrics Humans Management. Prenatal diagnosis Maternal Age Medical sciences Pregnancy Pregnancy, High-Risk Pregnancy. Fetus. Placenta Prenatal Diagnosis Retrospective Studies Trisomy - diagnosis |
| title | Differential Effect of Advanced Maternal Age on Prenatal Diagnosis of Trisomies 13, 18 and 21 |
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