That's why so many woman never take off the baby weight. Meanwhile you see pregnant Marines or Cross-fit women not get fat and go right back to their normal weight. When my mother was pregnant and going to an off-base doctor he asked if she was a Marine. She told him yes and asked why. "Female marines usually have slower healthier heart rates when pregnant compared to average women." This was back in the 80s so that divide is probably even bigger now. If our great-grand parents were to see us today.