Table 2.

Decrease in BMD depending on the site of measurements and the duration of lactation.

Study by	Time of Observation	Lumbar Spine	Femoral Neck	Radius
Laskey [108]	3 ms	3.96%	2.39%	n/d
Atkinson [113]	100 days	n/d	2.2%	n/d
Sowers [114]	6 ms	5.1%	4.8%	n/d
Hayslip [110]	6 ms	6.5%	n/d	NS
Affinito [109]	3 ms	6%	n/d	2%
	6 ms	7.5%	n/d	5%
Cross [101]	3 ms	4.3%	n/d	+5.7%
Kolthof [107]	3 ms	5.2%	n/d	n/d

Legend: BMD—bone marrow density; ms—months; n/d—no data; NS—no significant differences.