Don't give up hope. Six weeks is doctor speak. I think I usually make it four or five tops. In between I really am willing and able to do some pretty good stuff if H is game. But....yes, there is less physical attraction there and that is why the reliance is on the mental/relational. Anywhoo - take note and see what you think when it is your turn for that particular life experience.
I always get in trouble in the pregnant and directly postpartum period because I am very earth mothery on one hand but I identify very little with the cow or the bunny as a sexual being. When I am required to be a "cow" by the demands of a stage of my life (babyhood) eventually I find my lioness really itching. That is what tends to bring out some pretty agressive sexuality although strictly speaking I am in nurture mode.
That is the cross my H has to bear. He doesn't "get" the bunny at all but he kinda looks for a cow/monkey crossover which I am most definately not very often.