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प्रश्न
What do they observe to know that a person is pregnant in pregnancy test?
लघु उत्तर
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उत्तर
A pregnancy test detects the hormone human chorionic gonadotrophin (hCG), usually in urine or blood. The developing embryo and, later, the placenta produce hCG after implantation. A positive test indicates that hCG was detected; a healthcare professional may confirm the result and assess the pregnancy.
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