I'm sorry to hear that your baby had a brain hemorrhage. I hope it was mild, and that the majority of problems resolve quickly! The subchorionic hemorrhage on your 7 week scan was almost certainly UNrelated. A subchorionic hemorrhage is a collection of blood between the gestational sac and the uterine wall. These are quite common, and usually resolve spontaneously. They heal by reabsorption--similar to a bruise.
A neonatal brain hemorrhage is MOST commonly caused by prematurity, but can also be seen in term infants. If the baby had a stressful birth, or required oxygen, or if there was any evidence of infection, etc. these types of issues would much more likely be related to the brain hemorrhage.
I hope this helps!
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