Human blastocysts should hatch from the shell and begin to implant 1-2 days after day 5 IVF blastocyst transfer. In a natural situation (not IVF), the blastocyst should hatch and implant at the same time-about 6 to 10 days after ovulation.
Enlargement of the prostate-- benign prostatic hyperplasia or BPH--is a common condition in older men that typically results in a narrowing of the urethra. BPH often makes urination difficult and sometimes painful. In addition, BPH and its associated treatments sometimes results in adverse sexual side effects.
Kidney stones or prostate stones can be excruciating painful if lodged in the penis during masturbation or sexual intercourse. A condition called pudendal neuropathy can cause post-ejaculatory pain, but the pain it causes in the coccyx (tail bone), pelvis, and lower back is constant.