1. Reedy MB, Kallen B, Kuehl TJ. Laparoscopy during pregnancy: a
study of five fetal outcome parameters with use of the Swedish Health
Registry. Am J Obstet Gynecol. 1997;177(3):673-9.
2. Mazze RI; Källén B Appendectomy during pregnancy: a Swedish
registry study of 778 cases. Obstet Gynecol 1991;77(6):835-40.
3. Carson MP, Powrie RO, Rosene-Montella K. The effect of obesity and position on heart rate in pregnancy. J Matern Fetal Neonatal Med. 2002 Jan;11(1):40-5. PMID: 12380607
4. Kort B, Katz VL, Watson WJ. The effect of nonobstetric operation 
during pregnancy. Surg Gynecol Obstet. 1993; 177(4):371-6.
5. Kallen B, Mazze RI. Neural tube defects and first trimester 
operations. Teratology. 1990;41(6):717-20.
6. Carson MP, Gibson PS. Perioperative Management of the 
Pregnant Patient. PIER: Physicians Information and Education 
Resource. www.pier.acponline.org
7. CLASP: a randomised trial of low-dose aspirin for the prevention 
and treatment of pre-eclampsia among 9364 pregnant women. 
CLASP (Collaborative Low-dose Aspirin Study in Pregnancy) 
Collaborative Group. Lancet. 1994;343(8898):619-29.

8. American College of Radiology Committee on Drugs and Contrast

Media. Administration of contrast Medium to Breastfeeding Mothers.

ACR Bulletin. Oct 2001;57(10):12-13

9. Ito S. Drug therapy for breast-feeding women. N Engl J Med. 2000

Jul 13;343(2):118-26. Review. PMID: 10891521

10. Briggs GG, Freeman RK, Yaffe SJ eds. Drugs in Pregnancy and 
Lactation: A Reference Guide to Fetal and Neonatal Risk. 6th ed. 
Baltimore: Kippincott, Williams & Wilkins; 2001.
11.  Carson MP, Fisher AJ, Scorza WE. Atrial fibrillation in pregnancy associated with oral terbutaline. Obstet Gynecol. 2002 Nov;100(5 Pt 2):1096-7.PMID: 12423819