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Doctor insights on: What Does It Mean If A Child Has An Extra Chromosome

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What does it mean if a child has an extra chromosome?

What does it mean if a child has an extra chromosome?

A genetic accident: Human cells are supposed to have 23 chromosomes from father's sperm that pair up with 23 chromosomes from mother's egg. If either donation has an extra chromosome because of a genetic error, it is passed along to the fetus most common extra chromosomes in live births are on 13, 18 and 21. They cause unusual physical features, intellectual disability and, sometimes, organ malformations. ...Read more

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Mc in 1st trim,may b because of mismatch chromosome or chromosomal abnormality,means chances of next child 2 b born with chromosomal defects r more?

Mc in 1st trim,may b because of mismatch chromosome or chromosomal abnormality,means chances of next child 2 b born with chromosomal defects r more?

Not on the internet: That specific question cannot possibly be answered on the internet. You need a geneticist to do the right tests and provide you with a competent consolation or evaluation. ...Read more

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When a child is born with extra chromosomes is that a genetic trait from the father side or the mother side? Or can it go both ways?

When a child is born with extra chromosomes is that a genetic trait from the father side or the mother side? Or can it go both ways?

Both but not a trait: During formation of either egg or sperm (gametes), the chromosome (c) pairs that make up the normal cell separate & each gamete is supposed to have 1/2 of a pair. If any pair does not separate, three rather than a pair of that c be in the embryo. Having an extra c in every cell of the fetus confuses development.Miscarriage or birth defects often occur.This is not a trait but an error in whole cms. ...Read more

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Is it true that the chances of having a child with a chromosomal abnormality increases as a womans age increases over 40 year?

Is it true that the chances of having a child with a chromosomal abnormality increases as a womans age increases over 40 year?

Yes: It actually increases to a small degree with every year after peak fertility in the mid 20's. At 40 the risk of a trisomy 21 down syndrome reaches 1% while at 45 it reaches 2%. This number is added to the random risk of 4% that any pregnancy has of an unexpected event (cleft palate, premi, other defect). ...Read more

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Can you have a child with the physical characteristics of edwards syndrome but not have any chromosomal abnormalities?

Can you have a child with the physical characteristics of edwards syndrome but not have any chromosomal abnormalities?

Yes: Some of the physical signs of edwards syndrome are non-specific, that is, shared by other syndromes, with or without chromosomal abnormalities. No one sign is diagnostic, and several signs could be present in a child with normal chromosomes and without its having edwards syndrome. ...Read more

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Chromosomal mutation in my right foot. I am now pregnant and i worry that this abnormality can be carried over to my child. What is the risk?

Chromosomal mutation in my right foot. I am now pregnant and i worry that this abnormality can be carried over to my child. What is the risk?

Unknown: Without a specific DX it is impossible to offer any suggestions on recurrence risk. Your best source of information will be a geneticist who can review the condition and any genetic factors along with the other genetic input from both sides of the family to give you a sence of what could happen. ...Read more

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Does slow rising hcg, if pregnancy turns out to be viable, indicate a chromosomal abnormality that could result in child with birth defects?

Does slow rising hcg, if pregnancy turns out to be viable, indicate a chromosomal abnormality that could result in child with birth defects?

Possibly: Healthy and viable pregnancies usually double the value of the HCG hormone every 48 hours. There are many tests that are used now to predict and/or define fetuses with chromosomal abnormalities. Because of your age these tests should be offered and considered. ...Read more

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What are the chances my child will be born with chromosomal abnormalities? I was told my unborn child has echogenic bowels, that i tested higher for the risk of Down syndrome and as a carrier of the cystic fibrosis trait

What are the chances my child will be born with chromosomal abnormalities? I was told my unborn child has echogenic bowels, that i tested higher for the risk of Down syndrome and as a carrier of the cystic fibrosis trait

There : There are several ultrasound findings that can suggest down sysndrome, and echogenic bowel is one of them. There could be other explanations for that finding, though. It sound like you will need some testing to find out what's going on. The two tests used most commonly are amniocentesis and chorionic villous sampling. Each has its own risks and benefits, so you should discuss them with your obstetrician. I would suggest that you do this sooner than later, and regardless of whether the outcome might lead you to terminate the pregnancy. ...Read more

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Why does chromosome 13 get an extra copy?

Why does chromosome 13 get an extra copy?

Error in formation: During formation of the egg , the chromosome (c) pairs that make up the normal cell separate and each egg is supposed to have 1/2 of a pair. If a 13 pair does not separate, three rather than a pair of 13's will form when the egg & sperm join. Having an extra 13 in every cell of the fetus confuses the fetal development. Miscarriage or birth defects often occur. ...Read more

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Whats worse. Missing or extra chromosome material?

Whats worse. Missing or extra chromosome material?

Good question.: Missing is generally worse, with the exception of turner syndrome when one instead of two x chromosomes is present. ...Read more