If breast feeding, bleeding may occur in a female infant. It is not abortifacient and does not disrupt existing pregnancy. A women may be ethically opposed if she believes life begins at fertilisation. The risks of emergency contraception are small and are outweighed by the benefits of preventing an unwanted pregnancy. It is most effective when the first dose is taken within 24 hours of unprotected intercourse.
Efficacy declines as the interval increases.
If emergency contraception fails, research to date has shown no reported foetal abnormalities following the use of hormonal emergency contraception - so no medical indication for termination of pregnancy. A normal outcome to any pregnancy cannot be guaranteed. The first two tablets must be taken within 72 hours of unprotected intercourse, the second dose of two tablets should be taken exactly 12 hours later. The GP should be contacted before giving an increased dose. No alteration in dose is required for other antibiotics.