Hi\u1ec3u Chu K\u1ef3 Kinh Nguy\u1ec7t<\/strong><\/h2>\n\u0110\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c ng\u00e0y r\u1ee5ng tr\u1ee9ng, tr\u01b0\u1edbc ti\u00ean b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 v\u1ec1 chu k\u1ef3 kinh nguy\u1ec7t c\u1ee7a m\u00ecnh. Chu k\u1ef3 kinh nguy\u1ec7t c\u1ee7a m\u1ed9t ng\u01b0\u1eddi c\u00f3 th\u1ec3 k\u00e9o d\u00e0i t\u1eeb 21 \u0111\u1ebfn 35 ng\u00e0y, nh\u01b0ng trung b\u00ecnh l\u00e0 28 ng\u00e0y.<\/p>\n