Symptoms and Signs Before Prenatal Pregnancy What you need to know is that pregnancy is an exciting journey for every woman, but unfortunately, sometimes miscarriage happens. Fetal arrest is when the embryo stops growing and developing without any warning. Understanding the symptoms and signs before fetal arrest can help women detect problems early and take timely action. The following four aspects will be introduced. Physical Symptoms When your body never feels pregnant, some women may notice that their body feels unusually normal early in pregnancy, such as: no nausea or vomiting, no breast tenderness or nipples turning dark, or missing.