1. Endocrine and chronobiological effects of fasting in women
Sarah L Berga, M.D., Tammy L Loucks, Judy L Cameron, Ph.D. 
Fertility and Sterility 
Volume 75, Issue 5, Pages (May 2001)
DOI: /S (01)

2. Figure 1 Schematic diagram of the experimental protocol.
Berga. Endocrine effects of fasting in women. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )

3. Figure 2
Mean ± SE of melatonin concentrations (picograms per milliliter) in 14 women before (open circles) and during (closed circles) the last 24 hours of a 72-hour fast (top panel) and in 8 women who were studied on separate days but who did not fast (bottom panel). Note the phase advance of melatonin onset in those who fasted as compared with the nearly identical circadian melatonin profiles in those who did not fast.
Berga. Endocrine effects of fasting in women. Fertil Steril 2001.
Fertility and Sterility  , DOI: ( /S (01) )