What are the birth defects caused by birth control hormones?

None. The hormones in birth control pills, or Progesterone shots ("depo provera") are not thought to cause birth defects. Many women inadvertently take birth control after they have already conceived and their children do not seem to have any increased risk of birth defects.
Ocp SAFETY. 8% of women conceive on the pill. If there were birth defects we'd see them.