What are considered probable signs of pregnancy?

Probable signs of pregnancy are indicators that suggest a woman is likely pregnant but are not definitive proof. These signs can be assessed by a healthcare provider and are based on changes observed during the physical examination or through laboratory tests.

The correct answer includes Chadwick's sign, which refers to the bluish discoloration of the cervix, vagina, and vulva due to increased blood flow and is a classic probable sign. Blood and urine tests that detect hormones such as human chorionic gonadotropin (hCG) are also included, as they provide objective evidence of pregnancy when positive.

These signs can help healthcare providers make an informed assessment, although they are not as definitive as confirming the presence of a fetus through ultrasound. The other options include signs like amenorrhea and nausea, which are usually considered presumptive signs of pregnancy, as they are often experienced by women during early pregnancy but can be attributed to other factors. Breast tenderness falls into a similar category. Quickening refers to the first movements of the fetus felt by the mother, which is a positive sign of pregnancy but not definitive without an ultrasound.