Smoking is associated with a reduced risk of hypertension during pregnancy

The puzzling association between smoking and hypertension during pregnancy

Zhang J, Klebanoff MA, Levine RJ, Puri M, Moyer P. The puzzling association between smoking and hypertension during pregnancy. Am J Obstet Gynecol. 1999 Dec;181(6):1407-13. doi: 10.1016/s0002-9378(99)70384-4. PMID: 10601921.