Am I getting the right advice?

NIPT: Trisomy X detected

12WK MFM scan: 4.9mm NT, cystic hygroma, jugular sacs, heart & brain anatomy appeared abnormal

16WK: 5.5mm NF, persistent cystic hygroma, no heart/ brain anomalies seen. Amnio FISH and microarray confirmed Trisomy X but found nothing else.

20 WK scan: 7.5mm NF, persistent cystic hygroma. NO abnormalities viewed howevever cerebellum tr was measuring small at 14.4mm.

Whole exome sequencing found no additional genetic disorders/mutations to Trisomy X.

I have a 24 week scan next week.

I have repeatedly seen that people are offered/undergo fetal echocardiograms in cases such as mine but its not been mentioned to me. My OB said echocardiograms are only done once babies are born. MFM Dr told me the anatomy scan is better than a fetal echocardiogram and it's very detailed.

Can anyone explain the difference between what is examined in an anatomy scan of the heart vs an echocardiogram? Whontypically performs it? Should I be pushing to have one done? I think I am finding it hard to accept that we have gone from our girl seemingly having no chance of surviving at 12 weeks to things potentially being okay.

Any insight, advice or experience welcomed.