I'm doing a systematic literature review on Medical Marriages (well, I was before 2nd year took over....I'll return to it soon) and this is what my research has turned up.
Female Physicians invariably marry either another physician, or another professional.
In relationships where the other professional is a physician, the females statistically works fewer hours to spend more time with the motherly duties. The male physician tends to spend even more time working once the children are born.
In relationships where the other professional is a non-physician, the male's career takes a back seat to the female's career. The male also takes on more traditionally female roles since the career of a physician is a larger conceptual burden.
Of the people who meet someone and get married while still in medical school, the divorce rate is 60%.
Some foreign countries are stopping females from attending medical schools. These countries where medicine is socialized, and the state pays all education fees. The reasoning for this decision is that females work fewer hours during the reproductive/child rearing years and therfore the education is "wasted" on individuals who will practice fewer hours than male candidates.
Per Specialty, the worst job to have is Psychiatrist....50% divorce rate..followed closely by surgery. The best job to have to save your marriage is IM....23% divorce rate.
CAVEAT: Much of this info is taken from studies done in the 1980's and early 1990's. Also most studies are descriptive or interventional, not survey or interview based.