<prompt> A feilized ovum reaches uterine cavity in?3-4 days5-6 days7-8 days10 days  <response>: 3-4 days REF: Williams obstetrics 22nd ed, Langmans Medical Embryology 9 edition page 45 LH Surge 24 hours before ovulation Ovulation 0 hours Feilization 24 hours after ovulation Day 1 Reaches uterine cavity 3-4 days post feilization Day 4-5 post ovulation Implantation 7-9 day post feilization 