Hab grad noch das hier gefunden:
Effectiveness is an important and common concern when choosing a birth control method. Like all birth control methods, the cervical cap is more effective when you use it correctly. It is more effective for women who have never given birth.
* For women who have never been pregnant or given birth vaginally, 14 out of 100 who use the cervical cap will become pregnant each year.
* For women who have given birth vaginally, 29 out of 100 who use the cervical cap will become pregnant each year.
QuelleVielleicht kann jemand noch mal den PI aus diesen Aussagen fürs Lea umrechnen:
One-hundred-eighty-two (182) volunteers contributed data to the analysis of safety and 146 to that of contraceptive efficacy. The unadjusted six-month life table pregnancy rate was 8.7 per 100 women for spermicide users and 12.9 for non-spermicide users (p = 0.287). After controlling for age, center, and frequent prior use of barrier methods, the adjusted six-month life table pregnancy rate was 5.6 for spermicide users and 9.3 for non-spermicide users (p = 0.086), indicating that use of spermicide lowered pregnancy rates, although not significantly, during typical use.
QuelleDann hab ich noch das hier:
Women were randomized to use the FemCap or Ortho All-Flex contraceptive diaphragm, both with 2% nonoxynol-9 spermicide, for 28 weeks. The objectives were to compare the two devices with regard to their safety and acceptability and to determine whether the probability of pregnancy among FemCap users was no worse than that of the diaphragm (meaning not more than 6 percentage points higher). The 6-month Kaplan-Meier cumulative unadjusted typical use pregnancy probabilities were 13.5% among FemCap users and 7.9% among diaphragm users. The adjusted risk of pregnancy among FemCap users was 1.96 times that among diaphragm users, with an upper 95% confidence limit of 3.01.
Quelleund das hier
These findings indicate that Femcap, used with either a spermicide or a nonspermicidal lubricant, is comparable to the diaphragm in terms of its ability to prevent the penetration of sperm into midcycle cervical mucus.
QuelleWobei vom Lea in einer ähnlichen Studie gleiches gesagt wurde. Woher kommen dann aber die vielen Lea Schwangerschaften hier im Forum?