Commenter Triet writes, in the anti-menstruation pill post:

It's been amazing seeing my wife and other women deal with her first pregnancy. Immediately upon announcing to the world she's pregnant, my wife was part of the "in crowd." Every mother--whether she knew my wife well or not--could smile and talk about morning sickness, or finding out the baby's gender, or feeling bloated, etc.

So, it is not aesthetic. Humanity derives meaning from shared experiences, and deleting one of the most universal and central of all female experiences can subtract perceived meaning from people's lives. In that regard it is very important.

Humanity does derive meaning from some shared experiences — but not all. Shared experience that you bond over: pregnancy. Shared experiences that you don't bond over: hangnails, nearsightedness, tooth decay. Shared experiences that people sometimes seem to bond over, but that I'm sure they'd be much better off without: various illnesses or operations that some elderly people stereotypically discuss with each other, but which they'd be glad to avoid without any worry about lost "meaning."

My sense is that menstruation falls within the second (or, less likely, third) category of experiences rather than the first. To many women, pregnancy is a harbinger of their joy in becoming a mother, an affirmation of their fertility (something many women worry about before they become pregnant), a sign of a growing bond with their husbands, and more. Menstruation, it seems to me, is far removed from that: While it is part of the same system that may eventually lead to pregnancy, it doesn't have the directness of connection to a growing baby, it doesn't prove fertility in a way that would ease the woman's fears, it doesn't strengthen the marriage, and in general it lacks very little redeeming value.

But let's hear from some people who actually menstruate, and have been pregnant. When you menstruate, do you feel that you're part of the "in crowd"? If you chose to stop -- not because of menopause, which is a marker of age and of lost fertility, but voluntarily and reversibly -- would you feel "out"? Do you smile and talk to your friends about the cramps, the mood swings, and the like? Do you feel you derive meaning from the fact that you share menstruation as an experience with other women? Would you feel meaning subtracted if you stopped menstruating, because menstruation is so "central" a "female experience[]"? Do you find menstruation to be similar to pregnancy in any emotionally positive way?