Minimum effective dose of ethinyl estradiol in combination oral pills is:

Ans. is a, i.e. 10mgRef: Dutta Obs. 6th/ed, p542; Shaw 15th/ed, p231"Intensive pharmacological research clinical trials conducted to minimise the adverse effects of estrogen without reducing the contraceptive efficacy, resulted in lowering the dose of oestrogen to a minimum of 20mg or even 15mg"Thus, Remember: Low dose OCPs have estrogen = less than 50mcg (30-35mcg usually) - Ref: Dutta Obs 6th/ed, p542* Very low dose OCPs have estrogen =20mcg* Minimum effective dose of Estrogen =10mcg