To clear up, any energy loss due to impregnation and pregnancy is temporary.
Just like in human women, the weight gain and other changes of pregnancy are “only temporary”
:^o
OK, Temporaray with a hell of a lot of work to get back in shape for most women, or a lot of time.
Babies don’t have much animus, so yeah you do loose some of that, but your life experiences will bring you back to where you were eventually.