Are single-ingredient birth control pills less effective than two-component pills? Is there a higher risk of ectopic pregnancy with single-ingredient tablets?

With the ideal use of contraceptive pills, both one- and two-component pills are referred to as an effective method of contraception. Single-component tablets require more discipline in use. For this reason, they are considered "less effective". The literature states that the risk of ectopic pregnancy is slightly higher with single-component contraceptive pills than with two-component pills. The effectiveness of contraception is determined by the so-called Pearl index. The Pearl Index indicates the number of women who became pregnant during the year while using a given method of contraception per 100 women who have regular intercourse. For contraceptive pills, the following values of the Pearl index are determined: - mini-pills (single-component tablets) - 0.14 - two-component tablets - 0-1.26 The actual effectiveness of the contraceptive preparation is influenced by many factors, such as the regularity of use or the use of other drugs including contraception. A detailed description of the Pearl indicators given depending on the method of contraception can be found in the opinion: https://www.gdziepolek.pl/opinie-i-pytania/38171/jaki-jest-akutalny-wskaznik-pearla-dla-poszczegolnych-metod-antykoncepcji-i-ktora