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Notes:
Since sperm can only move 2 to 3 mm per minute using their own power, they must be helped along somehow. At the shortest, sperms can be found in the oviducts only 5 minutes after ejaculation. Other sperms can take 45 minutes.
The Natural Family Planning method of attempting pregnancy relies on changes in mucus thickness for the timing of intercourse�the character of the mucus is a good indicator of the presence of a viable egg.
