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DOWN SYNDROME
Topics you will find:
Our story about Stephen
Parenting the Child with Down Syndrome
Frequently Asked Questions About Down Syndrome:
How frequently does Down Syndrome occur?
Why does Down Syndrome occur?
Why us?
What potential medical problems might a Down Syndrome baby
have?
How smart are Down Syndrome babies?
As Martha gave her final push and I eased the precious head out of the birth
canal, out popped a pudgy little hand with a curved little finger. In a flash, I
realized that we were parents of a baby with Down Syndrome. The baby we expected
was not the baby we got.
As we parent Stephen, we are realizing that a child with special needs exacts
from us a special kind of parenting. For special-needs children the principle of
mutual giving really shines. As Stephen develops special skills, we develop
special skills. He is bringing out the best in us.
Down Syndrome (formerly called mongolism), named after Dr. Langdon Down, who
described these children in 1866, occurs in one out of seven hundred births. The
chance of having a Down Syndrome baby increases with the age of the mother.
- Women under age 23—1 in 2,000 births
- Women at age 30—1 in 1,300 births
- Women at age 35—1 in 400 births
- Women at age 40—1 in 90 births
- Women at age 45—1 in 32 births
- Women at age 50—1 in 8 births
Depending on how they are presented, these figures can be scary. If a doctor
says to a mother, "At age thirty-five you have five times the chance of having a
Down Syndrome baby than you did at age twenty," that would scare many senior
mothers from conceiving. Here's how I present the risk factors to my patients
who ask. At age twenty you had a 99.95 percent chance of not delivering a baby
with Down syndrome; at age thirty-five your chances of not delivering a baby
with Down Syndrome are 99.75 percent. Doesn't that figure sound more reassuring?
This is why, in my opinion, the "thirty-five-year-old scare" is too young,
forty-five perhaps? Even at age forty-five you have a 97 percent chance of
delivering a baby without Down Syndrome. So, for mothers of later childbearing
age, these figures are looking up.
Because of these risk factors, we believe that it is unwarranted to scare a
thirty-five-year-old mother into prenatal diagnostic tests (either amniocentesis
or chorionic villi sampling). Weigh these facts: At
age thirty-five your statistical chance of delivering a Down Syndrome baby is
0.25 percent. However, the risk of damage to a normal preborn baby during these
tests may be around 1 percent. At present, the AFP (alpha fetal
protein) test is inaccurate for the prenatal diagnosis of Down Syndrome and is a
source of much needless worry to pregnant parents. Whether or not you have a
prenatal diagnostic testing is an individual judgment call between you and your
doctor. But remember, your doctor is legally obligated to offer these tests to
any mother thirty-five years of age or older.
Normally, a sperm and an egg each contain twenty-three chromosomes. At
fertilization they combine to form a cell with forty-six chromosomes. Sperm and
egg cells undergo normal divisions, called meiosis, producing exact copies of
the original cell. Sometimes, by chance, during meiosis the division is unequal.
One cell gets one less chromosome and dies. The other cell gets one extra
chromosome and lives. If this cell (95 percent of the time it's the egg) joins
with the sperm (or egg), the resulting fertilized egg contains forty-seven
chromosomes. In the case of Down Syndrome the extra chromosome is number 21, so
the genetic name for this syndrome is trisomy 21, that is, the cells have three
number-21 chromosomes. There are other trisomies that usually end in miscarriage
or early infant death. Why an extra chromosome causes the features of Down
Syndrome is unknown. This unequal division of cells is called nondisjunction. It
occurs by chance and accounts for 95 percent of the chromosome abnormalities in
Down Syndrome. A rare genetic form of this syndrome (occurring in around 2 to 3
percent of these babies) happens by the mechanism of translocation. In this
situation, one of the number-21 chromosomes parts company with its mate and
attaches to another chromosome, giving the appearance of the cell having only
forty-five chromosomes. However, the person is normal because he or she has all
the genetic material of forty-six chromosomes. When a sperm or an egg from this
normal person containing the translocated number-21 chromosome joins with
another sperm or egg, the resulting fertilized egg appears to have forty-six
chromosomes, but actually has three number-21 chromosomes. To confirm which type
of chromosome abnormality your baby has, a geneticist analyzes your baby's
chromosomes in a blood sample. The type of chromosomal abnormality, either
nondisjunction or translocation, can be ascertained by looking at the chromosome
alignment in your baby's blood cells. While most translocation abnormalities
occur by chance, occasionally one parent is a carrier of cells that may contain
a translocated number-21 chromosome and therefore has an increased risk of
having more Down Syndrome babies. If analysis of baby's blood reveals a
translocation type of abnormality, analysis of the parents' blood will reveal
whether this happened by chance or whether a parent is a carrier and therefore
has a risk of future babies inheriting this abnormality.Another type of Down
Syndrome is called mosaicism, meaning some of the baby's cells contain the
normal number of chromosomes, and others have an extra number 21. This is why
many cells of your baby's blood are analyzed. Sometimes, but not always, a baby
with mosaic Down Syndrome is less affected.
Chromosomal abnormalities happen by chance. You did not cause this by
anything you did or did not do during pregnancy. A woman is born with a certain
number of eggs and does not produce new ones during her life. The longer an egg
lives, like any tissue, the more likely something will go wrong. Why this
happens in sperm is more of a mystery. New sperm cells are continuously being
made. There is no such thing as an "old sperm." For some unknown reason the risk
of nondisjunction occurring in sperm increases in men over fifty.
Down Syndrome babies are prone to a number of potential medical difficulties.
- Heart defects: Around 40 percent of Down Syndrome babies are born with an
abnormally developed heart. Most of these conditions are now surgically
correctable.
- Intestinal defects: Around 4 percent of these babies are born with a
blockage in the upper intestine, called duodenal atresia. This must be
surgically corrected to allow food to pass.
- Hypothyroidism: This occurs in around 10 percent of children with Down
Syndrome. Because the chance of this condition increases with age and may not be
apparent on examination, it is wise to check your baby's thyroid function at
least every two years.
- Vision problems: Many children with Down Syndrome develop a variety of eye
problems, such as crossed eyes, nearsightedness, farsightedness, and cataracts.
- Hearing problems: Around 50 percent of these children have varying degrees
of hearing problems. Their increased susceptibility to middle ear infections
contributes to this.
- Instability of the vertebrae's: In 10-20 percent of these babies, the first
two vertebrae, where the spinal column joins the neck, are unstable (called
atlanto-occipital instability ). Babies
with this condition are prone to spinal cord injuries from a jolt during contact
sports. All Down Syndrome children should have X rays of the upper spine before
entering school (between four and five years of age) and before being allowed to
participate in contact sports.
- More colds: Down Syndrome babies have reduced immunity, which together with
small nasal passages makes them more prone to sinus and ear infections.
Down Syndrome children have less-than-average intellectual functioning; some
are more impaired than others. With early intervention and special education
many of these children are able to join mainstream classes in school. Language
lags are the most noticeable of the impairments. Because they do not go through
motor milestones as quickly, it's like watching the remarkable unfolding of
development in slow motion. Because parents cannot take milestones for granted,
infant development takes on an added element of anticipation and excitement.What
they may lack academically, these babies make up socially. Like all children,
Down Syndrome babies have good and bad days. But, in general, these babies are
affectionate and just plain happy. Many share constant hugs and kisses and
radiate a generally carefree attitude. Their giving and caring attitudes are so
contagious that those around these babies wonder who is really normal. There is
indeed an up side to Down babies.
Practice attachment parenting. With these babies, the attachment style of
parenting really shines. It gives you the ability to read the special needs of
your baby, almost like having a sixth sense. You will need a deeper sense of
intuition and observation because your baby's cues may initially not be so easy
to read. Weighing how your baby looks and acts in relation to other babies will
tear you apart. As I was coming to terms with parenting a special-needs baby,
every time I examined a baby in my office I would think, "Our baby doesn't look
or feel like that." In reality, I was filling my mind with the gut-wrenching
feelings that our baby was less valuable than other babies. The real
breakthrough came when I was able to focus on the special qualities of our baby
rather than on what he was missing compared with other babies. Find out what
resources, such as early intervention programs, are available within your
community. Consider joining a Down Syndrome support group if there is one in
your area. You will be amazed at the practical suggestions and insights from
parents who have gone through situations similar to yours and have coped and
thrived. One mother of a Down child wrote to us: "Stephen will bring flashes of
color to your life that you never knew existed." Some parents plunge right into
as many support groups and community resources as they can and feel comfortable
immersing themselves in learning as much as possible about parenting their child
with special needs. Other parents feel more comfortable choosing only a few
support resources, deciding it is better for their family situation if they do
not focus their entire lives on Down Syndrome but, rather, incorporate their
special-needs baby into the mainstream of family life. They feel this approach
emphasizes more of the individuality of their special baby. For example, when
Stephen rubs his palm across my cheek, the caress of his soft touchy hand is
unlike any touch I have ever felt. Special-needs babies can bring special gifts
to the family. In my experience, parents who practice attachment parenting get
in harmony with their special needs baby and develop an incredible sensitivity
toward him. This sensitivity carries over into their social, marital, and
professional lives. Set up sibling sensitivity. This sensitivity is also
contagious to siblings. Parenting special babies is a family affair. I have
noticed that when siblings pitch in and care for their special needs brother or
sister, it mellows out their usual egocentric and selfish natures, enabling them
to become giving, nurturing, and sensitive children. In general, a special-needs
baby can elevate the sensitivity level of the whole family. Be a happy couple.
On the other hand, parenting a handicapped baby can cause marital stress. It is
necessary to keep some balance in your babycare. Some mothers focus totally on
the special needs of the baby and withdraw from the needs of other members of
the family. It is natural for a mother of a special-needs baby to feel, "My baby
needs me so much; my husband is a big boy and can take care of himself." Each
spouse needs to care for the other so that they can better care for their baby.
Friends, be sensitive. A word of advice for friends and relatives: The worst
thing you can do is shower sympathy on the parents of a Down Syndrome baby.
Statements like "I'm sorry for you…" Devalue the baby—and the parents. After
all, mother delivered a baby, perhaps not "normal" by our standards, but a
unique person who will make his or her own contribution to that family and to
society. After the birth of our baby, when the parade of friends began, the most
uplifting statement I remember is from an experienced grandmother who offered,
"My wish is for you to become excited about your special baby."
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