Cai Lun

Cai's contribution is considered one of the most important inventions in history, since it enabled China to develop its civilization much faster than with earlier writing materials (primarily bamboo), and it did the same with Europe when it was introduced in the 12th century or the 13th century. See also: A&E's Biography of the Millennium. The techniques of papermaking then spread to the West. Pincus's work may be some of the most influential science of the twentieth century. In 751, some Chinese paper makers were captured by Arabs after Tang troops were annihilated in the Battle of Talas River. The social, religious, ethical, and medical ramifications of this discovery are still being felt throughout the world, and his discoveries also led to the burgeoning sciences of steroidal hormone research, sex hormone research, and new forms of oncology. It immediately became widely used in China. Pincus's successes led to Searle introducing the first widely available oral contraceptive ("the pill").

Cai invented paper in 105. In May 1960, the FDA approved Envoid for contraceptive use. While paper is widely used worldwide today, the creator of this extremely important invention is little-known outside East Asia. The trails went on and were expanded to Haiti, despite high attrition rates, due to the large number of women eager to try this form of contraception. There, he committed suicide by drinking poison after taking a bath and dressing in fine robes. Pincus disagreed. Later, he became involved in intrigue and was imprisoned. Rice-Wray wrote Pincus and reported that Envoid "gives one hundred percent protection against pregnancy" but causes "too many side reactions to be acceptable".

The Emperor was pleased with the invention and granted Cai an aristocratic title and great wealth. Women, once again, experienced severe side effects from "the pill" (Envoid). For papermaking, he tried materials like bark, hemp, silk, and even fishing net, but his exact formula has been lost to history. Edris Rice-Wray. He was born in Guiyang during the Eastern Han Dynasty, and became a paperwork secretary (中常侍) of Emperor Hedi. Trails began there in 1956 and were supervised by Dr. AD 50—121), courtesy name Jingzhong (敬仲), was a Chinese eunuch, who is conventionally regarded as the inventor of paper. Puerto Rico was selected as a trial site in 1954, in part because there was an existing network of 67 birth control clinics servicing low-income women on the island.

Cài Lún (Wade-Giles: Ts'ai Lun, 蔡倫) (ca. There was a high incidence of side effects, which led to the Massachusetts trials being abandoned when the women refused to continue taking the contraceptive. These were initiated on medical students and institutionalized patients in Massachusetts. In order to prove the safety of "the pill," human trials had to be conducted. Pincus had to establish long term safety, as well as efficacy, of his progesterone contraceptive.

However, despite early success in preventing ovulation, and therefore fertilization, a study with beagle dogs that had been on the pill for three years showed an incidence of breast tissue nodules. Pincus, along with Min-Chueh Chang, investigated and established that progesterone would act as an inhibitor to ovulation. In 1953, Margaret Sanger and Katherine McCormick sought out Pincus for a project involving contraception. His experiments involving parthenogenesis produced a rabbit that appeared on the cover of Look magazine in 1937 and led to his dismissal from Harvard University.

Pincus's first breakthrough came early, when he was able to produce in vitro fertilization in rabbits in 1934. He was instrumental in persuading Searle to fund this research, at a time when Pfizer and Parke-Davis were reluctant to fund human trials. Pincus began studying hormonal biology and steroidal hormones early in his career. Gregory Goodwin Pincus (April 9, 1903 - August 22, 1967), American physician, biologist, and researcher, was co-inventor of the contraceptive pill.

ISBN 080903817X. New York: Hill and Wang, A Division of Farrar, Strauss and Giroux. Devices and Desires. Tone, Andrea (2001).

ISBN 0520232585. Los Angeles: University of California Press. Imperialism in Puerto Rico. Reproducing Empire: Race, Sex, Science, and U.S.