Why is the mitzvah of pirya v'rivya, having children, commanded to men and not women? I heard an interesting explanation in the name of the Meshech Chochma to the effect that since childbirth inherently is dangerous, the Torah could not command women to enter into a sakanah. I am unable to understand this. The Minchas Chinuch writes that certain mitzvos inherently force a person to assume a high level of risk. The Torah commands the mitzvah of milchama, fighting a war, despite the inevitable loss of life. The mitzvah of milah is commanded despite the inevitable danger any surgerical procedure poses to an 8 day old child. So why would it be inconceivable for the Torah to command pirya v'rivya directly to women even considering the risk pregnancy poses to the mother's life?
I heard this explanation cited in the name of the Meshech Chochma, but was unable to find it. When I queried the person who said it over, he admitted to not being able to find it either, but had heard it from two Roshei Yeshiva who are reliable sources; however, one apparently also admitted that he had never found it inside himself.... so does anyone have a written source for this?