A few days ago, user /u/merger-arbitrage made a post about female n-count and marriage stability. The post suggests that a woman's number of partners is a risk factor for divorce. However, this is not a conclusion that can be drawn from the posted data. The numbers provided simply show us the median number of partners that divorced women have. As a result of their marriages and partners between these marriages, women who've been married several times will almost always have higher partner counts than women married once and never divorced.

When the risk of divorce is assessed by the number of premarital sexual partners, a counter-intuitive picture emerges. As of 2000s, women with 3-9 premarital partners had higher divorce rates than than women with 0-1 partners, but LOWER than those with 2 partners. Also, women with 4-5 partners were at a lower risk of divorce than women with 3 partners. Women with 10+ premarital partners, however, had the highest risk of divorce (almost 35%), but not much higher than women with 2 premarital partners (30%). **The median number of lifetime partners for women aged 15-44 is 3.2.

What's the reason for these trends? I'm not sure. I theorize that women with 0-1 partners are more religious and tend to score lower on sociosexuality (SOI), which leads to less partners. Women with 3-9 partners marry older and score higher on SOI, but are able to "get it out of the system" without any major problems. Women with 2 partners probably marry younger and are less educated because of their age, whereas women with 10+ partners are less educated and have lower impulse control. It must be noted that the differences in divorce risk between women with 2+ partners isn't big. Personality must be a much better predictor of divorce risk.

Source: https://ifstudies.org/blog/counterintuitive-trends-in-the-link-between-premarital-sex-and-marital-stability/