Thanks for the typo spots, I'll correct them asap.

I don't think there's really a gender imbalance. Households go out of their way to avoid male children ending up unattached and attached males are no more likely to die than attached females (possibly slightly less as they don't have childbirth to contend with) and I'm thinking maybe younger unattached males get treated better than the older ones as well because it's fairly certain some household will take them in. It's certainly one of the parts that I need to think more about.