When my wife had my first daughter, I did not think anything about the blood doctrine. She wasn't an active witness at the time and yet she still refused blood. She's had only two actual experiences with the blood issues that has convinced her that the society is right. One is her aunt contracting hepatitus from tainted blood during a transfusion, the other is her mom having surgery to remove her cancer and opting to do it without blood. Since the surgery went well she believes her mom received the best medical care.
By the time our second daughter was born, she was baptized and I had learned the truth about the truth TM . Needless to say I was more concerned this time than before but fortunately all went well. She delivered vaginally both times.