My wife just trained hard throughout and used common sense. Like no depth jumps. She competed in snowshoe comps, ran hills and did most everything she ALREADY was doing. Thats the key.
She started doing body weight work the first week after she gave birth and was back to her old body in just a few weeks. She worked her ass off for 20+ years though and a testament to hard, consistent work. She didn't eat like a pig during her pregnancy either and although she loosened up her guidelines, she used common sense and maintained 90+% consistency.
The key is being smart and using common sense. Good luck.