@kiranzubairkhalid: 1960s tak pregnancy test ke liye ek zinda mendak chahiye tha. 🐸➡️🧪 Aaj wahi kaam kaagaz ki ek chhoti si strip karti hai. Aur us par jo gulabi line dikhti hai, woh zyadatar strips mein sone ke nano kanon se banti hai. Strip sirf ek hormone dhoondhti hai: hCG. Jab embryo uterus mein tikta hai, yeh hormone banne lagta hai aur kuch hi dinon mein urine mein pahunch jaata hai. Strip ke 4 step: 1. Urine strip ke ek sire ko chhoota hai aur kaagaz use apne aap aage kheenchta hai. 2. Raaste mein antibodies hote hain, har ek par sone ka ek nano kan. hCG ho to yeh use pakad lete hain. 3. Test line par doosre antibodies jame hote hain. Woh hCG ko doosri taraf se pakadte hain: ek sandwich. Sona wahin jama hota hai aur gulabi line ubhar aati hai. 4. Control line har baar banti hai. Woh sirf yeh batati hai ki strip ne theek se kaam kiya. Sona peela hota hai, par itna bareek ho jaaye (lagbhag 40 nanometre) to laal dikhta hai. 1930s mein Lancelot Hogben ne paaya ki African mendaki Xenopus is hormone ko pehchaan leti hai: urine inject karne par woh kuch ghanton mein ande de deti thi. 1967 mein 26 saal ki graphic designer Margaret Crane ne pehli home test kit ka design banaya. Result mein do ghante lagte the. Aapne A guess kiya tha ya B? Comment mein bataiye 👇 Educational content. F #PregnancyTest #HowItWorks #hCG #Antibodies #GoldNanoparticles

KiranZubairKhalid

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Thursday 12 November 2026 05:50:37 GMT