The bulk of my work in Swedish records has been in the early to mid-19th century. During this time period in the area where the families I worked on lived, women were listed with their maiden names whether they were married or not. My attempts to find a certain relative were stymied until I realized that she had lived until the early 20th century and was listed with her married name and not her maiden name.
Times change. Common practices change. Make certain you are using the approach best suited for the time period and location in which you are working. What worked in one century may not work in another.