Perhaps I'm about to walk into your second common misconception, but I also thought that elective abdominal cases are verboten in pregnancy.
I think that sort of depends on your definition of "elective." I wouldn't recommend breast augmentation during pregnancy, but if a patient has symptomatic cholelithiasis that is bothersome, I'd put the gallbladder in a bucket. There are plenty of non-emergent cases that can be done safely in a pregnant patient.
There have been multiple studies that show abdominal surgery is relatively safe during pregnancy, including laparoscopy. When possible, it's recommended that patients wait until the second trimester because it's still a stress on the body and fetus, and the miscarriage rate is lower during that time period.
However, there are plenty of situations where the risk of non-operative management is equal to or greater than the risk of surgery. As surgeons get more experienced, they are becoming increasingly aggressive with the surgical treatment of pregnant patients.
Examples:
1. Hyperthyroidism refractory to PTU- Thyroidectomy regardless of trimester.
2. Symptomatic cholelithiasis- Probably wait until 2nd trimester if symptoms controlled with narcs.
3. Cholecystitis- Lap chole regardless of trimester, 3rd included. The recurrence rate is prett high.
4. Gallstone pancreatitis- Lap chole regardless of trimester, again based on the possible effects of a severe pancreatitis and the likelihood of recurrence prior to delivery.
5. Breast cancer- Oh boy this is a whole hour-long lecture in itself, and I'll defer to WS, but lumpectomy is still an option, chemo is still an option (2nd trimester and beyond), and sentinel lymph node with radioactive colloid (but not lymphazurin blue) is still an option.
I keep going back to biliary disease because it's common in pregnancy, and you're likely to see it a lot during residency. There are a couple good articles that I'll post later when I have pubmed access that will help a lot.