What are the unmistakable positive signs of pregnancy?

The unmistakable positive signs of pregnancy are those that definitively indicate the presence of a developing fetus. A positive pregnancy test detects the hormone hCG, which is produced soon after the conception of an embryo. Fetal heart tones, typically detectable by a Doppler ultrasound around 10-12 weeks of gestation, provide clear evidence of a viable pregnancy.

Positive pregnancy tests and fetal heart tones are considered definitive because they are objective findings that confirm pregnancy. Their presence can lead to a diagnosis of pregnancy with a high level of certainty, as opposed to symptoms or physical signs that may have other explanations. Other options include subjective symptoms or signs that could arise from various conditions and are not specific enough to confirm pregnancy unequivocally.