DD (2 weeks old yesterday) almost exclusively only takes one boob per feeding (and only for 8-12 minutes usually). DD1 did this too but not until a little later (I want to say closer to 2 months of age). I'm not concerned or anything, because she's gaining weight and is going 3ish hours between feedings, I'm just curious if others are experiencing the same thing already.
AVT - 12.2.11

LCT - 5.15.14 ~ 9lbs, 22.5 inches
Re: BFers - one or two boobs per feeding?
Welcomed our rainbow baby 5/20/2014! It's a girl!
Like yoday where he ate for like 8 hours back and forth. Ahh growth spurts
I always check to my boob when she is done, and sure enough, milk is still coming out.
Now if my nipples would just heal
My Hooligans.....Samuel Brice-Fritzgerald (6/30/10) and Payton Elizabeth (7/23/08)
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I'm struggling emotionally with breastfeeding and am not sure how long I'm going to keep it up, so I'm thinking about pumping the other side for a week or two to build up a stash. Still undecided on that, though.
DS: 11/8/11 | 9 lb 7 oz, 22 in
DD: 5/22/14 | 9 lb 9 oz, 21.5 in
T 2.12 | W 5.14
BFP#2 2.5.11 (EDD 10.15.11) DS born 9.28.11
BFP#4 8.27.13 (EDD 5.6.14) DD born 4.23.14
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Mommy by the Sea
The book Breastfeeding Made Simple says this is largely related to whether or not you have large milk storage (not related to breast size). If one boob holds a lot, that's all they need; otherwise, two it is.
Mommy to my sweet boy, JG, born May 15, 2014
Baby #2 due 4/26/16!
DS: 11/8/11 | 9 lb 7 oz, 22 in
DD: 5/22/14 | 9 lb 9 oz, 21.5 in
In my case, I will offer the 2nd if she still seems hungry after done with first; however, most times she falls asleep on first.