Thank you for your query.
Subchorionic haemorrhage means a bleeding from the tissue around the baby that support the growing pregnancy
At 6 weeks, you should have been able to see a proper fetus with cardiac activity ( heartbeat ).
With subchorionic bleed, chances are high that she would abort this pregnancy.
What can be done right now is to take appropriate pregnancy supportives in the form of progesterone
, as prescribed by your doctor.
Ask her to rest, avoid sexual activity, avoid stress
If repeated ultrasound
after a week shows similar or worse picture, she would have to go in for a termination.