I think a 6 week old baby will be eating during a 4 hour shift, so yes I'd pump then. It's hard to give the baby a bottle and not pump at that time (even if you feed one breast when you get home and pump the other one, it could get a little confusing to tell your breasts at 6 weeks that they have a 4 hr break, so supply could go down).Â
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The best advice I ever got was to keep the bottles small enough so baby is hungry for you but big enough that he's satisfied. Which meant I never sent more than 4 oz for a feeding his whole life and started him with 2.5 oz when he was 8 weeks.Â
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I'd join the yahoo group PumpMoms if I were you, it's very helpful.Â
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It really just comes down to nurse on demand at home, make sure you nurse before you leave, go no more than 3 hours (esp at first) w/o pumping at work, and make sure you make as much as baby is eating each day. Use a hands free pumping bra and massage your breasts to get out more milk. Check your email on your phone and relax during pumping times. Nurse a lot at night while baby is sleeping to keep your supply up and leave little bottles for dad to feed at night.Â
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