Which of the following are considered probable signs of pregnancy?

Probable signs of pregnancy are those indicators that are more objective and can be detected or quantified by a healthcare professional. Frequent urination often occurs due to hormonal changes and the growing uterus pressing on the bladder, making it a common probable sign. Positive home pregnancy tests indicate the presence of the hormone human chorionic gonadotropin (hCG), which is produced shortly after a fertilized egg attaches to the uterine lining. These signs are credible evidence pointing towards pregnancy but aren't definitively conclusive by themselves.

In contrast, fetal heart tones and quickening relate to positive signs, which indicate a confirmation of pregnancy. Uterine growth can be a source of confusion, as it can occur for reasons other than pregnancy, and increased appetite is too subjective to be classified as a probable sign. Fatigue and skin changes, while potentially experienced during pregnancy, are more symptoms that can vary greatly and are therefore not classified among the probable signs. Understanding these distinctions helps clarify the classification of signs during the assessment of potential pregnancy.