In reply to alj:
Keeping your life insurance I would have thought it depends on loads of factors. some I thought of
1. whether you are planning to have more children - how long you will be not earning
2. if you were to pop your clogs how much the money would make a difference of not, that depends on overall finances, do you have a mortgage
3. if you were to pop your clogs would your husband be able to call upon support of family and friends for childcare, school pick ups etc
4. remember childcare full time cost doesn't continue for ever, although once at school there might be breakfast clubs and after school groups (dont ask me how much they are though).
My wife is the main earner - she is insured - me I earn somewhat less and have no life insurance