<font color="aa00aa">sunflower,</font>
think 4th wk is a bit too early to pump as milk ss not established, unless ur bb is not feeding n u feel engorged, then i think it's ok to pump. no point stressing urself at this point cos ss will only establish ard 6~8 wks.
i'm an AA b4 pregnancy, can only expressed abt 80ml when my breast is super engorged (cos my girl super sleepyhead). well, maybe u'll think it's a lot, but that's when it's super engorged lor.
think ard 6th or 7th or 8th wks or later, i started expressing 3 hourly cos girl just won't latch. and can only get 50~60ml per session.. diligently pump at 6am, 9am, 12nn, 3pm, 6pm, 9pm, 12mn everyday during ML and ss increased gradually. now back at work, i expressed 3~5 hrly and can get 150~260 per session on good days,
BUT, i pump for 40~45 mins per session. sometimes pump 45mins only get 100~120ml.
if u can, keep latching ur girl & forget abt the pump for the moment
cos that's the only (gauranteed) way to increase ss