Filter my results
Search
Displaying 1 - 4 of 4
Pregnancy Tests
By: Kristin Kelley
| Published: Sep 02, 2010
Throughout history methods involving urine have been a popular way to test for pregnancy. Early ideas ranged from simply observing the color of a…
TechnologyPregnancy TestsReproductionFertility
The Aschheim-Zondek Test for Pregnancy
By: Kristin Kelley
| Published: Sep 12, 2010
Throughout history many different methods have been devised for the early detection of pregnancy. From the time of the Ancient Egyptians, inspection…
Pregnancy TestsReproductionFertility
Amniocentesis Prior to 1980
By: Kristin Kelley
| Published: Sep 02, 2010
The extraembryonic membranes that surround and originate from the embryos of vertebrates such as birds, reptiles, and mammals are crucial to their…
AmniocentesisReproductionFetus
Tay-Sachs Disease
By: Kristin Kelley
| Published: Oct 29, 2010
In 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 DisordersHeredity