How do ovulation predictor kits assist in preventing pregnancy?
Home ovulation predictor kits are available to confirm the presence of urinary luteinizing hormone (LH), which precedes ovulation by one to two days. These kits are expensive and usually used by women who wish to conceive, rather than as an adjunct to monthly contraception. By establishing when the LH surge occurs sex can be avoided for the next five days (for contraception) or scheduled around this time when pregnancy is desired. The couple is not protected from sexually transmitted diseases including HIV.
