In this book, the Secret Order's sect master, Feng Jingyu, transmigrated to ancient times. After giving birth, she needed to perform a C-section to remove the child. In the end, she saved herself and her child's lives. The plot is similar to what you described. In addition, the pig's trotters were also good at healing poison and were proficient in soul capture techniques. They led a glorious life with their children. I hope you like my recommendation. Muah ~