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AIBU?

Share your dilemmas and get honest opinions from other Mumsnetters.

Confined Placental mosaicism

4 replies

Kirsty662 · 06/11/2025 07:06

Hey
Bit of a background all my scans have been normal up until 20 weeks pregnant they initially told me they couldn't get very good measurements of baby so to go back in 2 weeks times.
Fast forward to the the scan at 22w had the scan and the dreaded news that baby head is measuring 2 weeks behind with low amniotic fluid 1.9ml got sent to fetal medicine unit they did a scan and said all babies structures are normal, brain everything normal, they said the whole of baby is measuring small and low fluid is a concern, I done a cvs took some parts of the placenta and this result showed 50% abnormality chromosome in the cells, done an amnio from baby fluid to test waiting on the results, had another scan heart beating well, placenta appears normal, and fluid has increased a tiny bit, fast forward to now I'm 24 weeks on Saturday and currently booked in for a terminate before that time, I'm absolutely terrified if I keep the baby something will be seriously wrong and I can't have another child with additional needs,
Has anyone else had this? What was the cause? I'm so unsure of what to do?

OP posts:
HighburyHope · 06/11/2025 11:12

No experience, but as I understand it a diagnosis of confined placental mosaicism means that a chromosomal abnormality is not affecting the foetus but only the placenta. Have you had the opportunity to ask all your questions at the clinic? They should be supporting you through this. Sorry for what you’re going through.

Ella31 · 06/11/2025 13:53

There is a pregnancy thread on mumsnet, you might find more relevant responses there than aibu.

Geneticsbunny · 06/11/2025 14:04

You need to wait for the amnio results. Hopefully they will confirm placental mosaicism and you can carry on.

Bootsies · 06/11/2025 14:29

why wouldn't you wait for the amnio results?

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