This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Feilised ovum reaches uterine cavity by : 
Select and explain. 
A. 3 to 4 days after feilisation, B. 6 to 7 days after feilisation, C. 7 to 9 days after feilisation, D. 1 to 2 days after feilisation
A: 3 to 4 days after feilisation
Answer: A: 3 to 4 days after feilisation 
Explanation: Feilization takes place at the ampullary end of the Fallopian tube, the ovum is then transpoed by the contractions of the tube into the uterine cavity, aided by the fluid current impaed from ciliated epithelium. The morula enters the uterine cavity about 3 days after feilization. Reference : Williams Textbook of Obstetrics 24th edition page 89