when Dr. Borgerhoff Mulder looked at who extracted the greatest reproductive payoff from serial monogamy, as measured by who had the most children survive past the first five hazardous years of life, she found a small but significant advantage female. Women who worked their way through more than two husbands had, on average, higher reproductive success, a greater number of surviving children, than either the more sedately mating women, or than men regardless of wifetime total.
Via NYTimes