Final answer:
Cervical softening and uterine souffle are considered probable signs of pregnancy, denoting more reliable evidence of pregnancy compared to presumptive signs but not as definitive as positive signs (4).
Step-by-step explanation:
Cervical softening and uterine souffle are classified as probable signs of pregnancy. Probable signs are those detected by an examiner and more reliably suggest pregnancy than presumptive signs, which are noticed by the woman herself (such as missed periods or morning sickness) but could be caused by conditions other than pregnancy.
Positive signs are definitive evidence of pregnancy, such as hearing the fetal heartbeat or visualizing the fetus on an ultrasound. Diagnostic signs are not typically used in this context, as they could refer to signs used to diagnose various medical conditions, including but not limited to pregnancy.