As the title says, I find the hormone mix during pregnancy and the tiredness afterwards quite a challenge to deal with (esp being quite 'old'!).
We have talked about going from 3 to 4 (still not a large family by this board's standards, I know), but I really worry about the impact it would have on our existing three. DC1 esp has spent much of his little life with me being pregnant or having sleepless nights with a baby. I worry about the impact of another 2-3 tired years on them. I'm just not as energetic or fun when I am pregnant/tired.