Ligation is nearly 100% effective, but it is irreversible. Although tuballigation and vasoligation can be undone by the present-day advanced medical science but the functions of spermatic ducts and uterine tubes cannot be totally recovered. It is especially serious with recovered uterine tubes, which may lead to exfetation and is lethal. So one needs to weigh his/her steps before choosing ligation as a contraceptive way.

The rhythm method through calculating the ovulation time

There is another contraceptive way called the rhythm method. With training and knowledge, a woman can figure out when her ovulation happens during her menstruation period by taking her body temperatures and observing cervix mucus every morning. If she stops having sex on that day and a few days before and after that day, it is safe.

The rhythm method does not need any extracorporeal substance that usually meddles with body mechanism and sexual intercourse itself. If it is properly used, it will be 90% plus effective for lifetime. This method is also advocated by the Catholic Church.

Contraceptive pills and other contraceptive devices are mainly used to stop the discharge of sperms and ova and fertilization, or the implantation and growth of fertilized ova. As for the latter, however, many people in the medical and religious circles consider it similar to abortion. Of all the contraceptive methods, pills are the most commonly used. But not long ago, it was reported that pills caused blood vessel embolism and then deaths of women in New Zealand, which makes many couples worried. It will be OK, however, if you ask doctors for advice before taking.