During one week of inactive period iron and folic acid
tablets are given & drug(hormonal
) free period results in withdrawal bleeding.Continuous exposure of the hormones might result in excessive exposure of the uterine tissue (endometrium) to hormones & disturbs the biological rhythm.This might result in excessive cramping/bleeding/irregular periods
etc.Prolonged exposure might also result ill effects like uterine cancer
.Hope this answers your question.Take care.