A 28-year-old female presents to the obstetrics office, suspecting she may be pregnant. Which of the following would the nurse recognize as a presumptive sign of pregnancy?

Choice A rationaleEnlarged uterus is a probable sign of pregnancy, often caused by uterine growth. Probable signs are those observed by the examiner but not definite.Choice B rationalePositive fetal cardiac activity on ultrasound is a positive sign of pregnancy. Positive signs are definitive proof of pregnancy, observed via imaging or hearing fetal heart tones.Choice C rationaleAuscultation of fetal heart tones is a positive sign of pregnancy, indicating fetal presence. Positive signs confirm pregnancy through direct observation or hearing the fetus.Choice D rationaleAmenorrhea is a presumptive sign of pregnancy, commonly due to hormonal changes. Presumptive signs are subjective symptoms experienced by the woman, like nausea or breast tenderness.