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Throughout history many different methods have been devised for the early detection of pregnancy. From the time of the Ancient Egyptians, inspection…
Pregnancy TestsReproductionFertilityThroughout history methods involving urine have been a popular way to test for pregnancy. Early ideas ranged from simply observing the color of a…
TechnologyPregnancy TestsReproductionFertilityIn 1881 British opthalmologist Warren Tay made an unusual observation. He reported a cherry-red spot on the retina of a one-year-old patient, a…
Tay-Sachs DiseaseCongenital DisordersHeredityThe extraembryonic membranes that surround and originate from the embryos of vertebrates such as birds, reptiles, and mammals are crucial to their…
AmniocentesisReproductionFetus