Ovulation after intercourse back pain, small abdominal pain, is not a manifestation of pregnancy, is due to the ovulation, when the egg is discharged, there will be follicular fluid discharged into the female pelvis, follicular fluid will be accumulated in the uterine rectal depression inside, some women will be more sensitive, so that the phenomenon of lumbar acidity, small abdominal distension and pain. After pregnancy, the fertilized egg is still relatively small, still inside the fallopian tube, under normal circumstances, women do not have any feeling, will not appear the phenomenon of lumbar and abdominal pain, so ovulation lumbar and abdominal pain, is a normal phenomenon, after the follicular fluid is absorbed will be better, about 2-3 days the symptoms will be relieved.