We had a sister born with Trisomy 13, 25 years ago she only made it to 8 months old. SO this whole thing is really scary.
First off I know your pain and soooo sorry for you and your sister.
I think everyone has covered what your sister's next step should be and I think the number one thing is to get a new doctor ASAP.
The only thing I want to add is that your sister should have a karaotype done of herself. If your Mom gave birth to a baby with Trisomy 13, she could have a genetic condition called "balanced translocated chromosones"
Do you know if your Mom had any miscarraiges or if anyone else in the extended family had miscarriages? If you have BTC you can misscarry, have a child that is monosomy or trisomy.
If your sister is carrying a child with a chromone problem the only way to know for sure is with an aminio, but please remember, this is a routine test done alot now a days, but also one that can cause misscarriage.
From my understanding from what I have gone thru, most high risk doctors do not want to perform a amino after 18 weeks, but things could have changed since I had my last one.
I also don't understand WHY your sister never had the neck measurement done sooner. From what I rememeber if it's NOT done between 11 - 14 weeks??? then the test isn't reliable.
When your sister has her talk with the genetics doctor, she should make sure to mention your sister that was born with trisomy and she should ask to have her karaotype done.
After all of this is done and she fines out that she has BTC please PM me with any and all questions that her doctor doesn't have for her and I will do my best to answer them for her and point her in the direction of a fantastic support group for people with this.
Wishing you and your sister lots of
