S. H. Al-Nuamii, A. M. Al-Jubouri, K. M. Sultan, A. K. Mohammed, and Z. M. Hamandi, “Physiological Changes In Spirometric Parameters During Pregnancy In Iraqi Women”, JFacMedBagdad, vol. 54, no. 4, pp. 321–324, Jan. 2013, doi: 10.32007/jfacmedbagdad.544694.