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Post coital test

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

Authoring team

This is a test of cervical hostility to spermatozoa.

Procedure:

  • test performed at the time of ovulation - determined from rise in patient's basal body temperature, or detection of urinary LH
  • intercourse 6 - 12 hours previously
  • cervical mucus obtained by syringe, placed on a warm slide, and covered with a coverslip
  • with a simple light microscope, assess number and motility of sperm

Interpretation:

  • more than 20 motile sperm per high power field - semen penetration is normal i.e. being ejaculated into correct space, sufficient number, no immune problems
  • 0-20 motile sperm per high power field - repeat test in a further cycle at time of ovulation

Two negative results should be followed by a cervical mucus test to assess for problems of immunity.

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