Emergency contraception When it is used:
If unprotected sex when pregnancy is undesirable and
there were not used methods of contraception (including rape)
when method was used unsuccessfully (condom was broken or slipped of)
improper use of method (when pills are got not regularly)
Existing methods of emergency contraception
progestin pills
combined estrogen-gestagenic pills
cooper containing intrauterine devices (IUDs)
The mechanism of action of emergency contraception
There is more than one method of action
The main mechanism of action is suspension of ovulation or its complete absence
when the method is used during the first half of the menstrual cycle, before ovulation
Other methods have not been fully defined, although it is perceived that:
there is an influence on the function of the yellow body
thickening of cervical mucous
prevents movement of eggs and sperm into fallopian tubes
not effective fertilization
changes in endometrium (is not confirmed by modern researches)
Emergency contraception does not cause termination of an existing pregnancy
The faster method will be used after unprotected intercourse the greater its effectiveness
Efficiency of the method in terms of time
Efficiency of the emergency contraception
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