Overview
Introduction
Positive signs provide conclusive proof that a fetus is present.
Positive signs provide conclusive proof that a fetus is present. They cannot be attributed to other conditions. Ultrasound visualization of embryo/fetus: - Gestational sac on TVUS: as early as 4.5–5 weeks - Fetal heartbeat on TVUS: as early as 6 weeks - Fetal anatomy: well defined by 10–14 weeks Auscultation of fetal heart tones (FHTs): - Doppler FHTs: detectable at 10–12 weeks - Fetoscope (Pinard stethoscope): detectable at 17–19 weeks - Normal FHT: 110–160 bpm Fetal movement perceived by examiner (ballottement confirms fetus): - Not to be confused with ballottement under probable signs - Palpable fetal parts (Leopold maneuvers at 28+ weeks) - Examiner-felt fetal movement: distinctly different from maternal perception KEY POINT: Positive pregnancy TEST (urine or serum β-hCG) = PROBABLE sign, NOT positive. This is a common exam question. For NCLEX-RN (Canada), items rarely announce the topic in the first sentence. Anchor to objective data, trajectory, and the safest next step for the role named in the scenario before incorrect options compete.