dog meeting new baby

i am currently pregnant and my babys due in febuary but im alittle bit worried about indroducing my dog to the baby. my dog is 3 years old and has a really good temperment with children and adults but i dont the best way to indroduce baby and dog help!

First:
   
DO NOT PANIC! (In large, friendly letters)
   
Your dog's good w/kids & good-tempered-a major good thing, it shows the dog is inclined to welcome small humans at random times & is likely not prone to over-reacting.
   
One question: What's the dog's breed & sex? (I will now call the dog "Binky", to cut down on letters).
   
This is what I'd do:
   
Let Binky roam around the new nursery for a month or so before you deliver. This'll get Binky used to the concept of Something Is New In The House & let him/her study the new furniture fully.
   
Take an extra small or baby blanket to the hospital when you go in for the birth. Wrap Baby in the blanket at least a couple of hours. If Baby is housed in your room w/you, this is easy. Also hold Baby in the blanket as much as possible the first day; this'll mix your scent w/Baby's. After Baby's been in the blanket for a day, have it taken home; give it to Binky to smell. This'll familiarize Binky w/Baby, & w/your scent mixed in, it'll tie Baby's scent to yours in Binky's mind. Since you're likely to be home in only 2 or 3 days (barring unforeseen problems), the idea will be fresh in Binky's mind.
   
When Baby comes home, let Binky come into the nursery to sniff at Baby in the crib. This intro should be done after Binky's calmed down from the inevitable "You're HOME!" excitement.
   
Allowing Binky to wander in & out of the nursery - as long as the crib is secure - will get him/her used to having Baby around.
   
Security note: If you'd like to exclude Binky from the nursery, but still want to have the nursery door open, buy an inexpensive wooden screen door w/a hook closure & mount it on the outside of the door-frame: pet-exclusion & airflow at the same time.
   
Basic rules w/dogs & babies: 1) Never leave Baby alone w/Binky in an open, unsupervised situation, like on the floor. Baby can easily crawl away & get hurt/into trouble; Binky could wander off; if a door gets opened (some dogs & small children can do this), both could disappear. If Baby does something unexpectedly weird to freak out Binky, he/she could have an instinct reaction & accidentally hurt Baby. Always put Baby in a crib/playpen when leaving the room. = 2) Take Binky & Baby out for walks together so they get used to each other's company. = 3) Supervised dog-and-baby-on-the-floor should be a regular thing (kiddy pools, when Baby is bigger, can be fun for both) = 3) For safety's sake, don't encourage the child to kiss Binky on the face. = 4) Teach the baby early to be gentle & respectful of the dog's space (no ear-pulling).
   
Learn Binky's moods, so you can "read" Binky & tell if he/she's getting tense or upset; at these times, put Baby in confinement immediately & calm Binky.
   
Dog interest in new babies ranges from "Okay, it's a little human, fine - so can I have my dinner now?" to "A new puppy! I must supervise & babysit the new puppy!"
   
I've been making note of dog reactions to babies, & I've seen a range. Some simply ignore the baby until it's old enough to run around & play, then start romping with the kid. Some immediately plant themselves in front of the crib & take on guard duty if there's no human in the room. Some ignore the baby until it's crawling &/or toddling, then start to treat it like a puppy & supervise it (more on that later). Some resent the child as a rival junior dog (but this is not particularly common, & it usually wears off).
   
Most dogs will quickly accept a new baby as an additional member of the Family Pack.
   
About that supervision: some dogs are natural baby-sitters. These dogs insist on supervising small children, esp. once they start crawling around. In packs, there is always a baby-sitter on duty w/the puppies when the other pack members are out hunting. The sitter keeps the pups out of trouble, plays w/them & protects them. I've heard of dogs who plant themselves in front of the just-starting-to-crawl baby & flatly refuse to leave the child's side until an adult human physically takes charge of the baby. These dogs often try to herd the children & discipline them when they get troublesome.
   
If you're unfamiliar with how a dog cares for a baby it's mistaken for a puppy, it can be a bit scary: Supervising puppies/youngsters involves a nipping technique in which the dog lightly lifts the skin (in pups, fur), then lets go. It doesn't break the skin, as it's a grooming thing. The dog literally looks like it's nibbling on the child. Dogs will do this to other members of the family, too, as it's a mutual grooming technique.
   
This should be a beginning for you. Any other thoughts/questions/inquiries, I'll try to field them.

thank you for that well needed advise my dog is 3 years old and hes a staffordshire bull terrier.