Whether surgery during pregnancy will cause a miscarriage is not known for certain. If surgery must be performed, the earlier in the pregnancy the better, particularly during the first trimester. Pelvic surgery, such as removal of an ovarian cyst or an appendix, especially may be a culprit. However, if surgery cannot be avoided. In midtrimester surgery, drugs such as progesterone or ritodrine (uterine relaxants may be given for the first two weeks or so following the procedure.

It is not definite as to whether surgery cause any harm during pregnancy, but any elective surgery (that can be postponed) should be avoided until after the baby’s born. Or, if it is necessary to remove a gall bladder, for instance, because of gall stones, sugery could be performed before you become pregnant.

Surgery to remove fibroids should not be done during pregnancy unless the fibroids is attached to the surface of the uterus and can safely be removed.

Acute appendicitis is very difficult to diagnose in pregnancy, because the pain may not be felt in the typical area due to the altered position of appendix.