i think embarking on the assisted conception journey, whether you have a natural miracle, an IUI or IVF pregnancy, the stress to achieve that pregnancy is still a lot more stressful than someone that conceives within the first 12 months of "trying", or has an "oopsie" pregnancy. i think it would apply to pregnancy after miscarriage or loss of a child - it just seems like more of a miracle when you hit milestones... i dunno, maybe i just feel like that...