Today, based on your medical history, surgeons can usually analyze, quite accurately, your risk of complications (or death) before setting foot in the operating room.

WSJ: Book Excerpt: Confessions of a Surgeon

The surgeon will evaluate the part of your body that you want treated, and you'll share your medical history, list any medications you're taking, and discuss your desires and expectations.

CNN: Cosmetic surgery: What to know beforehand

The short answer is, you have to judge for yourself, based on your health and your family medical history.

CNN: Alcohol and breast cancer: Weigh your risks

And it's basically your own problem and your own medical history.

NPR: Health Care Debate: Why So Much Yelling?

Diagnosing schizoid personality disorder is usually based on an in-depth interview with your doctor about your symptoms as well as your medical and personal history.

CNN: Schizoid personality disorder

If you do not know whether your child has atopy, check your family's medical history, since such allergies are often genetic.

CNN: HEALTH

Your child's doctor or mental health provider will also look for other possible causes for your child's behavior, such as a history of medical conditions or trauma.

CNN: Mental illness in children: Know the signs

That's what a breast-feeding doctor -- an OB, pediatrician or family physician with a subspecialty in breast-feeding medicine -- would have done in Kelly's case: a complete physical and medical history (yes, in fact, it is relevant if your mother couldn't make milk) on mom and baby to see if any physical or anatomical factors were affecting supply.

CNN: Is the medical community failing breast-feeding moms?