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. Author manuscript; available in PMC: 2007 Sep 25.
Published in final edited form as: J Steroid Biochem Mol Biol. 2005 Jul;96(2):95–108. doi: 10.1016/j.jsbmb.2005.02.014

Table 1.

Main types of estrogen plus progestin regimens (modified after Ref. [27])

Regimen Estrogen Progesterone/progestin
Sequential
 Cyclic Days 1–25 Last 10–14 days of the cycle
 Continuous-cyclic Daily 10–14 days every month
Combined
 Continuous-combined Daily Daily
 Cyclic-combined Days 1–25 Days 1–25