I was on Family Leave for 3 months when dd was born. It helped that I knew in advance and was able to save some money, which isn't going to apply here.
But, there were some other things I did, like dropping my monthly parking permit (they allowed me to get on a short-wait list)--that was $195 a quarter. Reduce your cable/satellite and phone packages if you can. Use grocery store coupons and use the store circular when grocery shopping. Delay things like seasonal shopping if you can. Rent movies instead of going to the movies. Stretch your hairdressing appointments out until you're back at work. If you owe money on your credit cards, pay only the minimum for the months you are out. Suspend savings, including 401K, for those months as well. Of course you may already be doing some of these things, in which case you may not be able to reduce further.
Also think about what you will be saving by not going to work. Do you eat lunch out? That's a big savings there. Gas to and from work, oil change and wear and tear on your car, dry-cleaning costs if you're not wearing suits. You may be able to cook more from scratch and not rely on convenience foods (but that may depend on how much care you will be giving).
Also, if you carry the health care benefits, hopefully they are just going to take the usual premiums you pay. My company didn't charge the full amount while I was out, but I took an extra month off and had to pay the full cost.
Good luck to you.
It is easier to build strong children than to repair b.roken men.
"If you think education is expensive, try ignorance." -- Benjamin Franklin