Ladies do not underestimate the toll that pregnancy and nursing take on your body. The sleepless nights, the hormone shifts, the discomforts. I used to blame myself for not having it together. Well, now I'm perimenopausal and the difference is like night and day. I'm not on a roller coaster anymore. I have more energy than I've had in years.
(I know not everyone feels great during perimenopause and for some the irregular cycles wreak havoc with their moods and energy level. I'm just sharing my own experience compared to how I was with the constant pregnancies and nursing.)