
Sources: March of Dimes: Pregnant Complications. NYU: Fertilization and Implantation. Weiss, Robin E. 40 Weeks: A Week-by-Week Guide to Your Pregnancy.
Sources: March of Dimes: Pregnant Complications. NYU: Fertilization and Implantation. Weiss, Robin E. 40 Weeks: A Week-by-Week Guide to Your Pregnancy.