Baby growing slower than normal... anyone with similar experience?

Hi, I went for an ultrasound scan at 7th week pregnancy and couldn’t spot fetal pole and was diagnosed that it’s likely to be blighted ovum. Came back for another ultrasound scan at 10th week pregnancy and spotted a fetal pole which is 6th week in size... understand baby is likely not healthy cos it’s growing very slowly... anyone with similar experience? Can share? Thank you so much.