Final answer:
Objective signs of pregnancy include abdominal enlargement, increased breast tissue, dramatic increase in blood volume, and changes in the digestive and urinary systems.
Step-by-step explanation:
Objective signs of pregnancy include the following:
Enlargement of the abdominal region: One of the most obvious signs of pregnancy is the significant enlargement of the abdominal area due to the growing fetus, uterus, amniotic fluid, and placenta. This is accompanied by weight gain.
Increased breast tissue: During pregnancy, the breasts undergo changes and may become larger and more tender.
Dramatic increase in blood volume: Maternal blood volume increases by around 30% during pregnancy.
Changes in the digestive and urinary systems: Nausea, heartburn, and frequent urination are common symptoms of pregnancy.