It took about 4 months before my son let up on his loud opinions about his preferred breast. He still, at 11 months, will nurse longer on the left and without as much letting go to be distracted, but he doesn’t fight about it like he did when he was tiny. It affected my supply in the first few months (I could pump about 8 to 10 on the left and 3 or 4 on the right), but I never became lopsided (or if I did, I was too tired to notice LOL). The supply equaled out more when he got over his fussiness about it.

When my daughter was a month and a half, I had some pretty bad clogged ducts which turned into mastitis on my right side, and it affected my supply pretty badly. By the time that got under control, my daughter had formed a definite preference for my left side. I make sure to offer it to her whenever we nurse, but she doesn’t give it much of a chance. So I usually give up and switch her to the left more quickly than I should. I’m kind of curious to see how much more my left side produces, but I haven’t pumped yet to see.

Another lefty here. My 8 month old greatly prefers the left side and even fussed on the right in his first few days of life. It didn’t help matters when I got mastitis on the left and that killed my supply on the left. We’ve kept at it though and Sometimes he will hang with the left and sometimes he protests it. when I pump I usually get about 1/2 of the amt I pump on the right. It works though!

Yup, she has preferred the left from day 1! I do have a flat nipple on the right, which is probably why, so I often wear a nipple shield to her her to feed on the right. My supply is often larger on the left, but depends on time I’d day–and so does my lopsidedness! It isn’t too noticeable though.

YES! My son loves the right side, the left is always a fight. This has been the case for all 14 weeks of his little life, so now I have a left boob that produces about HALF what the right does (I pump at work, so I know), and is a full cup size smaller than my right. AWESOME. My son will take the left only, like you said, if he’s too conked out to know the difference, but even then he occasionally just wakes up and screams at my left nipple. Babies are so weird. So are boobs, for that matter.

http://shouldbethebeginning.com/2011/10/13/60065-part-i/

My son has a preference for the right, which peaked around 5-8 weeks, when he would go days at a time completely refusing to eat on the left at all. He is almost 4 months now and will still go longer on the right, but things have finally evened back out. I did the same thing with him – just kept offering the less preferred side until one day he didn’t fight it so much.

My six month old will only nurse on my left side as well. She started refusing my right side at about 4 months. I can occasionally get her to nurse, but only if she’s in the football hold position. I have no idea what happened. I now pump my right side 6-8 times a day to keep from losing my milk on my right side.