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Changes in size-adjusted BMC (SA-BMC) from 52 weeks postpartum in index lactation (L52). Black columns, neither pregnant nor lactating (NPNL); hatched columns, 52 weeks in a subsequent lactation (F52). Significance of increases: at NPNL=P<0.0001 at all sites except femoral neck (FN; not significant); at F52 none were significant. LS, lumbar spine; Sh, femoral shaft; TH, total hip; Tr, trochanter; WB, whole body.
