DH and I have been considering trying for baby#3. I am all for it, except that I have concerns. A year ago I was promoted to supervisor and I am concerned that if we do move forward with trying and we are successful that taking leave will negatively impact my career. Has anyone gone through something similar? Are you the supervisor or manager of a department and took leave while in that position. My main concern is that when I return they will have given my position away and they will simply have another place for me. My only other concern is childcare if we proceed. Currently both sets of in laws take turns and watch our boys. They do it for free which has been a HUGE help to my DH & I. But I'm beginning to feel like we take advantage of them...even though they love watching the boys. Anyone else feel like they should not have a baby/another baby unless they can pay for childcare?

BFP: 12-7-11,Bleeding/Cramping 5.5 wks along, Missing our August Angel

Re: Concerns over taking time off
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Isn't this a must when considering to conceive?
as for your other question re: your position, i thing the law provides that they should not give away your position while you are on ML. I think your concern is more on your boss getting turned off by you having to take another ML/or will be taking an ML after a handsome promotion -- which i think is unfair.
At this point probably, what you may want to consider before conceiving is if you can handle childcare costs for three, because loike what PP said, even if your ILs are great with your boys, that doesnt mean they could provide care for them as long as you'd like them to.
There are many reasons why we're one and done. One of the reasons is that to have another would have meant having to pay for daycare for 2 kids. My parents watched DS for us a LOT and it was a huge help - but I strongly suspect that 2 kids would have been too much for them.
Too many people are a bit too "oh, don't worry- it will work out" about having kids, but I don't fully believe that. I've seen quite a few women come here upset because "my mom/MIL said they'd watch the baby but now they say they can't - we can't afford child care!!!!".
People need to understand the impact of having kids and be prepared for all situations. If people RELY on others to watch their child for free and can't afford otherwise... Id say that they aren't ready to have kids/ more kids.
I'm not saying that's you - this is a bigger picture comment. BUT yes - you do need to go into this decision realizing that your free daycare situation may come to an end. More kids could be too much for your older parents.
As far as your job goes - if you'r company is large enough, you'd be protected by FMLA. They have to hold your job or give you an equivalent job when you return. And honestly- I dont' know that I'd not have a child because of what could but very well might not happen (i.e. it hurting my career) as far as my job goes.
Is at least one of your older children ready for pre-k? Could you send one or both of your boys to pre-k (either public school or private/daycare based) for at least part of the day to give your parents a break? I do think it is a LOT to ask to have them watch 3 kids on a regular basis. I agree that anyone with family childcare needs a Plan B in case the parents become unable/unwilling to continue the arrangement. With one kid, my Plan B is daycare, which would be over half my take-home income (ugh) and with two, we know we would be OK if I quit to SAH and I would be happy with that option.
GL
BFP: 12-7-11,Bleeding/Cramping 5.5 wks along, Missing our August Angel
Even if they are on board w/ the IDEA of a third, you still have to be responsible. I've been MANY people come here with ONE kid upset because their parents swore they'd be daycare, but once the child was here - the grandparents realized it was too much work for them. Going from 2 to 3 is a big change and the grandparents may way "yes! Have another" out of excitement, or the because they don't want to be the reason you don't, or... who knows why. But the REALITY of 3 kids might end up being too much.