Well, you've gotten alot of responses, but since I do have implants will throw in my 2 cents!
I got implants when I was 24 years old. At that time, I knew I wanted kids SOMEDAY...but no rush and no idea when. My daughter was born when I was 33...and I nursed her like a champ! In fact, I had so much milk it was crazy. My boobs were PERFECT before, and even MORE perfect after. They looked better and more natural after having and nursing my daughter. In other words, they were a little saggy...but perky! Just not fake perky!
Then, a year later, I had our first son. My boobs were HUGE during this pregnancy. I went from a 34D to a 36F! And I only gained 26 pounds, and our son weighed over 9 lbs when he was born. Keep in mind, my implants (saline) were now 10 years old. 5 days before my son was born, I woke up and only had one boob! Imagine my surprise and horror!!! Apparently, in the middle of the night, one of my implants deflated. I panicked, called my surgeon who recommended coming in for a replacement that day! JERK! The same jerk who NEVER mentioned that the average life of an implant is 10 years. So I called my OB who said it's fine...that seeing I was about to give birth, it would ruin my mammory glands, etc, and make breastfeeding almost impossible...and if I wanted to breastfeed our child, the surgery would have to wait until I was done.
Needless to say, I nursed our son for 8 months, at which time had to stop because I had to stop breastfeeding for at least 3 months before the replacement surgery. I was lopsided the whole time, and while sad, I also knew it was only temporary, because my son wouldn't nurse until he was 20!!
So, I got them redone, and proceeded to have another son, and breastfed him without a problem. Somehow, though, my boobs have gotten bigger, even though I am down to my pre-pregnancy weight. They don't look like they did when I was 24 or even 30, but hey, I am not 24, or 30 anymore! And they still look great and feel great, and I love buying bras!
When it all came down to it, I wanted to look and feel good for myself, but I also wanted to give my children every good start and benefit in life...and if it meant only having 1 boob for a while, then so be it! I got through it and it's so far behind me now...and my boobs are just boobs...nothing more nothing less!! They don't make me who I am :)
Good luck with your new baby girl! Enjoy every minute of her - it goes FAR too fast!!