Final answer:
Common symptoms of pregnancy include amenorrhea, increased urinary frequency, fatigue, breast tenderness, nausea, and heartburn, along with weight gain primarily in the abdominal area and breasts. Stretch marks and skin pigmentation changes, including chloasma and linea nigra, are also typical.
Step-by-step explanation:
Common Symptoms of Pregnancy
There are multiple symptoms and body changes that can indicate pregnancy. Some of the common symptoms of pregnancy include amenorrhea, which is the absence of menstruation, and other indicators such as increased urinary frequency, fatigue, and breast tenderness. During pregnancy, weight gain is primarily seen in the breasts and the abdominal region. Additionally, nausea and heartburn are frequent, especially in the first trimester, often referred to as "morning sickness". Maternal blood volume increases by approximately 30 percent and respiratory minute volume by 50 percent. Stretch marks, known as striae gravidarum, and a darkening of the skin, such as the linea nigra and deeper pigmentation of the areola, can also occur. Changes in melanin production may lead to conditions such as chloasma, which appears as blotchy brown patches on the face.