<prompt> Which of the following is the constituent of mini pill?Only progesteroneOnly estrogenEstrogen progesteroneNorethisterone estradiol  <response>: Ans: a Only progesterone Ref: Shaw, 13th ed, p. 228The constituent of minipill is only progesterone. It does not contain estrogen. It is also known as progesterone only pill.OCPa Combined- Monophasic- Multiphasic -Sequential pill only estrogen in 1st 14 days and estrogen progesterone in next 14b Minipill -Progesterone only pillMechanism of action of OCPCombined OC pills suppress pituitary hormones FSH and LH and through their suppression prevents ovulation. At the same time, progesterone causes atrophic changes in the endometrium and prevents nidation.Benefits of OCP1 Contraceptive - Prevention of pregnancy2 Non contraceptivea Cycle stabilizationb Cure of menstrual disorder c Protection against cancer- Ovarian- Endometriald Benign tumour- Benign breast disease- Ovarian functional cyst- Fibromyoma uteruse Protects against- P1D-Anaemia- Endometriosis- Acne, hirsuitism- Rheumatoid arthritis- OsteoporosisOCP reduces the incidence of ectopic pregnancy is due to suppression of ovlulation, and reduction inPIDSide effects of OCPI. MinorNausea, vomiting, lack of appetite, break- through bleedingBreast tendernessVaginal dischargeHeadache, migraineChloasmaWeight gainAcne, Oily skinII. Majora Cardiovascular disease- Stroke- Venous Thromboembolism- HT- Coagulation abnonnalitiesb Cancer - Breast Ca, Ca cervix, Liver Cac Diabetesd Gall stonese Affects lactation 