As living creatures we NEED exactly 6 things in life:
Protection (ie. a house, etc)
Space (ie. habitat)
This being said, as humans, we have pushed the boundaries of what nature intended, what biology intended. We eat things that, well, do crazy things to our bodies. We have polluted the planet that gives us all of the things we need. Our water and air are scary. We live in places that really are well beyond what we need, and have not only redefined habitat for ourselves, we have wrecked it for other living creatures. (I am not saying I'm innocent in all of this, just stating facts).
Having said that, reproduction is REALLY where we have changed the original biological needs. In all of the animal kingdom, primates are the only animals that have sex for pleasure. Of those primates, we humans are the only ones who deny general biological needs until the "time is right" for us - we don't procreate until we want (generally speaking). We mature slowly - 12-14 years on average to reach sexual maturity, but most of us do not reproduce at that time. In fact, it's considered taboo in many Western cultures to do so. We defy the innate biological hard-wired push to procreate.
So, what I wonder is, WHY am I so hell-bent on a child? Yes, we wanted children, but at what point did it become this thing that rules my world? That hurts me every day.....the emotions that also evolved with us are really quite contrary to general biological rules. As we evolved, we changed the rules for ourselves. So WHY this drive? Is it the hard-wiring in me? Realistically, in nature, my DNA and DH's DNA were not meant to be continued. Ask Darwin.
In any other grouping of animals, our line would not go on. DH's won't, at least not through him. Mine could, but perhaps there is a reason I'm infertile. We no longer, as a people in "developed" nations, allow nature to take it's course. We have intervened. That's why, initially, DH and I were NOT going to do IVF. If it wasn't meant to be, it wasn't meant to be. So....why are we here? Why are we doing this? If this is really what I believe, why?