Pregnancy and lactation have no long-term deleterious effect on measures of bone mineral in healthy women: a twin study.

BACKGROUND The long-term effects of pregnancy and lactation on measures of bone mineral in women remain unclear. OBJECTIVE We studied whether pregnancy or lactation has deleterious long-term effects on bone mineral in healthy women. DESIGN We measured bone mineral density (BMD; g/cm(2)) in women aged > or = 18 y. Analyses were performed on 3 data sets… (More)