Earlier quoted context omitted.
Any scientific research to support that? Just because you can put a nice story behind a theory doesn't make it true.
Some if it ties in with this: http://www.medicalnewstoday.com/articles/105013.php at least regarding sex at conception. I am not entirely sure about whether we really have hard direct data regarding sex at conception but that's one possibility regarding that data. On the other hand, it's possible that there are biological differences between sperm carrying X and Y chromosomes and that these might be selected for one…
Think of that one woman per 50 man on the Wild West. How tolerant to risk must she have been to go to a dangerous land populated mostly by men. All of her family must've told her to stay home, and she had no role models to follow.
Also, you mentioned that in biology it's well established that women are (inherently?) less adventurous than man. You've got research which talks about sex at conception, but I was asking about a research which proves that any such relation persists beyond conception and is not a result of sociological effects (because we're talking biology here).