1. Sex Steroid Hormones Modulate Serum Ionized Magnesium and Calcium Levels Throughout the Menstrual Cycle in Women 1 
Ozgul Muneyyirci-Delale, Vijaya L. Nacharaju, Burton M. Altura, Bella T. Altura 
Fertility and Sterility 
Volume 69, Issue 5, Pages (May 1998)
DOI: /S (98)

2. Fig. 1
Relation between low serum estrogen level (early follicular phase) and high serum estrogen level (ovulation) and serum ionized Mg2+ levels (mM/L) (A) and serum ionized Ca2+/Mg2+ ratios (B). Values are means ± SD.
Fertility and Sterility  , DOI: ( /S (98) )

3. Fig. 2
Relation between low (early follicular phase) and high (luteal phase) serum progesterone levels and serum ionized Mg2+ (mM/L) (A) and serum total Mg (mM/L) (B). Values are means ± SD.
Fertility and Sterility  , DOI: ( /S (98) )

4. Fig. 3
Relation between low (early follicular phase) and high (luteal phase) serum progesterone levels and serum ionized Ca2+/Mg2+ ratios. Values are means ± SD.
Fertility and Sterility  , DOI: ( /S (98) )