Maduforo, A. N.; Yakubu, T.; Nweke, C. P. O.; Onoja, I. U.; Okwara, C. C. The Nutritional Implications of Oral Contraceptives on Women. Pak. J. Nutr. 2016, 15 (8), 800–809. https://doi.org/10.3923/pjn.2016.800.809.