<prompt> The combined estrogen-progestin oral contraceptive pill act mainly by:Production of cervical mucus hostile to sperm penetrationMaking endometrium unsuitable for implantationSuppression of FSH and LH releaseEnhancing uterine contraction to dislodge the feilized ovum  <response>: Oral Contraceptives: OCP Mechanism Combined OCPE P Inhibition of ovulation Progesterone Cervical mucus thick and hostile EmergencyPost coitalMorning after pills Dislodging of implantation 