Signs and symptoms of pregnancy
Signs and symptoms of pregnancy are common, benign conditions that result from the changes to the body that occur during pregnancy. Signs and symptoms of pregnancy typically change as pregnancy progresses, although several symptoms may be present throughout. Depending on severity, common symptoms in pregnancy can develop into complications). Pregnancy symptoms may be categorized based on trimester as well as region of the body affected. Early pregnancy. Implantation bleeding. Implantation bleeding is light vaginal bleeding in the first 10 – 14 days of pregnancy and is caused by implantation of the egg in the uterine lining . Implantation bleeding is normal and may be confused with a regular period. However, vaginal bleeding in the first trimester, especially if heavy bleeding or if associated with pain, may be a sign of complications, such as miscarriage or ectopic pregnancy, and should be assessed by a healthcare provider. Breast tenderness. Hormonal changes in early pregnancy can cause breast swelling and tenderness. Breast tenderness typically improves as the body adjusts to the pregnancy. Fatigue. Fatigue in the first trimester is common due to changes in hormones. Nausea and vomiting (morning sickness). Nausea and vomiting, known as morning sickness, occurs in 80 % of pregnant women. Although described as "morning sickness," pregnant women can experience this nausea any time of day or night. The exact cause of morning sickness remains unknown. Nausea and vomiting in pregnancy is typically mild and self-limited, resolving on its own by the 14th week of pregnancy. Other causes should also be ruled out when considering treatment. Initial treatment is typically conservative, and may include changes to diet and emotional support. For women that do not improve with initial treatment, medications, such as pyridoxine and doxylamine, may also be used. A rare form of severe nausea and vomiting  known as hyperemesis gravidarum can occur in 1% of pregnant women and can affect fetal and maternal health.