I'm still jealous of every single person who has a) gotten married after me and is pregnant or b) got pregnant right away, barely trying.
BUT - the rest of my jealousy evaporated around month 6 when my sister got pregnant.
It wasn't pretty at first. Sister GG called me at school one afternoon and told me that she was pregnant. We had a short conversation and then I cried. I did. I'm the selfish older sister who was upset that she got married first and was even more upset when she got pregnant before me, without really trying. (She's 3 years younger than me and got married 1 year earlier).
Then she called me 3 weeks later because she was miscarrying. I have never felt more empathy for someone else as well as extreme embarrassed guilt at myself. I will never be upset for a second when someone I care about says they are pregnant. It shouldn't have taken my sister's pain to shock me out of my self-centeredness, but it did. In general, I am a much calmer, less bitter person.
The army of moms that interrupted my run at the park with their stroller-aerobics class though, jealousy on.