The new guidelines advise that, if one active pill is missed, there is no need to take additional precautions. If two active pills are missed, additional precautions should be taken for the next seven days.
The FSRH has also updated its advice on starting combined oral contraceptive (COC) use.
It now says that, if it is reasonably certain that the woman is not pregnant, COCs can be initiated on any day of the menstrual cycle, not just the first. However, additional contraceptive precautions are required for the first seven days if the pills are started after day five of the cycle.
The MHRA had asked the FSRH to issue new guidance to update its 2005 advice.