抽羊胎水 help me plz

You have to do the amniocentesis.
It is not because of your age, but because your blood result is abnormal.
You probably did a blood test + ultrasound measurement of the nuchal fold (skin behind neck) of the baby. This group of test is called OSCAR.
By OSCAR, the chances of having a baby with trisomy 13, trisomy 18 and Down syndrome are calculated.
So probably now you have an abnormal test result, i.e. the chance calculated from your blood test + ultrasound data shows the baby is very likely to have trisomy 18, i.e. one more chromosome 18.
Trisomy 18 is also called Edward syndrome. A child with trisomy 18 may not survive very long. If he/she does survive, he/she will have many problems, which may even be worse than those of a Downs baby.
Imagine if this baby is indeed abnormal. Do you want to have an abortion? If you decide to keep the baby anyway (which is not a very clever choice), you can skip the amniocentesis. Otherwise, you should do it.

廿八歲絕對不是高齡產婦，十七週更胎齡少。除非你上一胎有些什麼問題，否則一般情況都不用抽胎水。你有權問清楚是什麼事、有權seek for second opinion才決定、更有權say NO。究竟佢擔心乜野攪到要抽胎水？你知嗎，抽胎水有機會導致流產的，真係唔係話抽就抽的？如你所言屬實，咁佢未免有點輕率 。你可以搵另一個可靠d的醫生做多一次檢查(超聲波和抽血)，睇結果點，是否真的有需要抽羊水。

我曾經有一胎有問題，到第二胎時，醫生就問我是否想抽羊水確定胎兒無恙(人地解釋得好詳細，抽羊水的目的(即擔心d乜)、風險、有沒有其他檢驗方法代替、準確程度等)，最後我堅決唔抽，生出來個B咪又係健健康康，正正常常....

題外話：
有日我跌親尾段尾龍骨去睇私家門診，個醫生初步檢查之後都話好少事，要等時間自然慢慢好，照下X光得個明白而矣，但竟然都要照三張！仲有消炎藥和按摩膏。。。我終於明白佢地點"維皮"的了！

2007-09-22 10:52:21 補充：
Sorry，我唔識trisomy呢個字，是醫學名詞，牛津高階也找不到，所以比唔到意見。中文醫學我就知d，如你知中文是什麼，不妨說出來聽聽。但無論什麼問題，都係果句，睇多個醫生，問多個專業意見，平衡過才決定。祝平安。

2007-09-22 12:08:56 補充：
我終於找到Trisomy 18是怎麼一回事，原來是第18對染色體多了一條。除了18，其他染色體都有可能出現這個情況，如：21, 13... 這些是較罕見的病，有個英文website是介紹這種病的，你可以去看看。不過，不用太快擔心，因為醫生還是在懷疑階段而矣。現在最重要是放鬆心情，因你緊張，BB會feel到的。願主祝福您們！

2007-09-22 13:35:22 補充：
http://www.trisomy18support.org/

No need to 抽羊胎水 only 17 weeks pregnant. Baby is not stable. I advise you to see more than one doctor to confirm. I've two kids. My doctor asked me to 抽羊胎水 about 24- 28 months. Then I asked another two doctors. Finally I did not take this test. My kids are very healthy now. ^^ Relax and try your best to find out the reasons. See more doctors take more advice.