REFERENCES
- Prentice A, Dibba B, Jarjur LMA, Larskey MA, Paul AA: Is breast milk calcium concentration influenced by calcium intake during pregnancy? Lancet 344: 422–412, 1994.
- Finnley DA, Lonnerdal B, Dewey KG, Grivetti LE: Inorganic constituents of breast milk from vegetarian and non vegetarian women: Relationships with each other and with organic constituents. J Nutr 115: 772–781, 1985.
- Allen JC, Keller RP, Archer P, Neville MC: Studies in human lactation: milk composition and daily secretion rates of macronutrients in the first year of lactation. Am J Clin Nutr 54: 69–80, 1991.
- Neville MC, Allen JC, Archer PC, Casey CE, Seacat J, Keller RP, Lutes V, Rasbach J, Neifert M: Studies in human lactation: milk volume and nutrient composition during weaning and lactogenesis. Am J Clin Nutr 54: 81–92, 1991.
- Laskey MA, Dibba B, Prentice A: Low ratios of calcium to phosphorus in breast milk of rural Gambian mothers. Acta Paediatr Scand 80: 250–251, 1991.
- Sowers M, Randolph J, Shapiro B, Jannausch M: A prospective study of bone density after pregnancy. Obstet Gynecol 85: 285–289, 1995.
- Specker BL, Tsang RC, Ho ML: Changes in calcium homeostasis over the first year postpartum: effect of lactation and weaning. Obstet Gynecol. 78: 56–62, 1991.
- Kalkwarf HJ, Specker BL, Heubi JE, Vieira NE, Yergey AL: Intestinal calcium absorption of women during lactation and after weaning. Am J Clin Nutr 63: 526–531, 1996.
- Klein CJ, Moser-Villon PB, Dopuglass LW, Ruben KA, Troeki O: A longitudinal study of urinary calcium, magnesium and zinc excretion in lactating and non-lactating postpartum women. Am J Clin Nutr 61: 779–786, 1995.
- Strauss LT, Speckhard M, Rochat RW, Senanayake P: Oral contraceptive during lactation: A global survey of physician practice. Int J Gynaecol Obstet 19: 169–175, 1981.
- Kitai E, Blum M, Kaplan B: The bone sparing effect of oral contraceptive use in non-smoking women. Clin Exp Obstet Gynecol. 19: 30–33, 1992.
- Wolman RL, Clark P, McNally E, Harries MG, Reeve J: Dietary calcium as a statistical determinant of spinal trabecular bone density in amenorrhoeic and oestrogen-replete athletes. Bone Miner Res 17: 415–423, 1992.
- Kirksey A, Ernst JA, Roepke JL, Tsai TL: Influence of mineral intake and use of oral contraceoptive on the mineral content of human colostrum and more mature human milk. Am J Clin Nutr 32: 30–39, 1979.
- Hull VJ: Research on the effects of hormonal contraceptives on lactation: Current findings, methodological considerations and future priorities. Wld Hlth Quart 36: 168–200, 1983.
- Abdel-Kader MMA, Hay AA, El-Safouri S, Aziz MTA, el-Safouri S, Saad el-Din J, Kamal I, Hefnawi F, Abdalla M: Clinical, biochemical and experimental studies on lactation. IV. Quantitative and qualitative changes induced in goat’s milk by gestagens. Am J Obstet & Gynecol 105: 978–985, 1969.
- Toddywalla VS, Joshi L, Virkar K: Effect of contraceptive steroid on human lactation. Am J Obstet Gynecol 127: 245–249, 1977.
- Barsivala VM, Virkar KD: The effect of oral contraceptives on concentrations of various components of human milk. Contraception 7: 307–312, 1973.
- Diggle PJ, Liang K-Y, Zeger SL: “Analysis of Longitudinal Data.” Oxford, UK: Oxford Science Publications, pp 55–77, 1996.
- Parr RM, Demayer EM, Iyengar VG, Byrne AR, Kirkbright GF, Schoch G, Niinisto L, Pineda O, Vis HL, Hofvander Y: Minor and trace elements in human milk from Guatemala, Hungary, Nigeria, Philippines, Sweden and Zaire. Results from a WHO/IAEA Joint Project. Biol Trace Elem Res 29: 51–75, 1991.
- Jellife D, Jelliffe EFP: The volume and composition of human milk in a poorly nourished communities. A review. Am J Clin Nutr 31: 492–515, 1978.
- Zinaman MJ, Hickey M, Tomai TP, Albertson BD, Simon JA: Calcium metabolism in postpartum lactation: the effect of estrogen status. Fertil Steril 54(3): 465–469, 1990.
- Saarikoski M: Contraception during lactation. Ann Med 25: 181–184, 1993.
- McCann MF, Moggia AV, Higgins JE, Potts M, Becker C: The effects of a progestin-only contraceptive (levonorgestrel 0.03 mg) on breast-feeding. Contraception 40: 635–648, 1989.
- Seth U, Yadava HS, Agarwal N, Laumas KR, Hingorani V: Effect of sub dermal silastic implant containing norethindrone acetate on human lactation. Contraception 16: 383–398, 1977.
- Hillman LS: Mineral and vitamin D adequacy in infants fed human milk or formula between 6 and 12 months of age. J Pediatr 117: S134–S142, 1990.
- Prentice A, Barclay DV: Breast-milk calcium and phosphorus concentrations of mothers in rural Zaire. Eur J Clin Nutr 45: 611–617, 1991.