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In field interviews,the interviewer should not indicate his probes to the respondent's answers to questions on the interview form.
Pelvic or Fetal Ultrasound
A non-invasive imaging technique used to observe the developing fetus or pelvic organs using high-frequency sound waves.
Electron
A minute particle of matter charged with the smallest known amount of negative electricity; opposite of proton.
Negative Electricity
An outdated term historically used to describe what is now known as the flow of electrons, or electric current, particularly in the context of static electricity.
Proton
A subatomic particle found in the nucleus of an atom, carrying a positive electrical charge.
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