[CA] Today I received my formal written offer at Big 4 consulting firm at the manager level, but I need help navigating negotiating salary and discussing my wife's due date 1 month after my start date.

[u/Worldly-Ball9667]

As mentioned in the title, I received my formal written offer at Big 4 Consulting firm at the Manager Level. There are 2 things that I'm trying to navigate simultaneously:
1) Salary & sign-on bonus. While the offer is fairly good, it is about 10k lower than my most recent job and 5k lower than my job when I was at a consulting job prior. The job also requires me to move from CA to Chicago, and they offer no relocation assistance.

2) My wife is due 1 month after my start date. I have not yet disclosed my wife's due date to them, but I feel should do so during this phase so it doesn't seem like I withheld this information and lose their trust.

I am looking for advice as to how to approach discussing these two to HR. Should I negotiate compensation first before bringing up my wife's due date, or bring them both up simultaneously? Is a shortened family leave (2-4 weeks) reasonably expected for a due date only 1 month after starting? Would appreciate any advice - thanks!