Spectacles can also be a good form of birth control.
Vasectomy is a very effective (99.85%) birth control method. Only 1 to 2 women out of 1,000 will have an unplanned pregnancy in the first year after their partners have had a vasectomy.3posted by John Cohen at 5:37 PM on September 3, 2010
3. Trussell J (2004). The essentials of contraception: Efficacy, safety, and personal considerations. In RA Hatcher et al., eds., Contraceptive Technology, 18th ed., pp. 221-252. New York: Ardent Media.
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posted by hermitosis at 9:32 PM on September 2, 2010 [11 favorites]