The journey of pregnancy begins with conception, a miraculous moment when an egg is fertilized by sperm. During the first week of pregnancy, many women may not even realize they're expecting. However, this early stage is crucial for laying the groundwork for a healthy pregnancy. While there may not be significant dietary changes required during week 1, adopting a nourishing diet sets the stage for optimal fetal development. Here's a comprehensive guide on what to eat and avoid during the first week of pregnancy.