Back in 2010, when we were taking a break from treatment and trying to decide whether we really wanted to be parents enough to gamble $30K on a donor egg IVF cycle that might give us a chance at it, or whether we should go the adoption route (despite MM's misgivings about that option at the time), or whether we should simply resign ourselves to a childless life, I did a lot of reading and thinking about why I wanted to be a parent. Being a rational type, I wanted to make a well-thought-out and logical decision. (I wrote a post here asking others to share their reasons, and one of the comments there from a dear friend of mine is one of the best I'd ever heard on the topic.)
Now this article appeared on NPR this morning, and this explains so much. Wish I could have read this research a few years ago! Not that it would have changed my decision, or the path we took, but I think it might have helped me to understood why finding clarity on this point was so difficult.