<p class="MsoNormal"><span style="mso-spacerun:'yes';font-family:Calibri;mso-fareast-font-family:宋体;
font-size:16.0000pt;mso-font-kerning:1.0000pt;">It prevents or delays ovulation (the release of an egg), reducing the chance of fertilisation and pregnancy after unprotected sex.</span></p>