Mestranol1
- Concerns were raised in 1972 when it was noted that an oral contraceptive pill containing the artificial hormones mestranol and norethynodrel appeared to cause a case of metastatic breast cancer in a group of six female rhesus monkeys [252]. (quiverfull.com)
Norethindrone1
- During the 1950s two types of progestin that were later used in birth control pills were created, norethindrone and norethynodrel. (asu.edu)