Women are being urged to order emergency contraception in advance as the Christmas party season approaches.
The British Pregnancy Advisory Service (BPAS) says women could find it difficult to obtain the drug quickly over the holiday period.
It is offering emergency contraception free of charge in the post to women who fill in an online form and talk to a nurse over the phone.
An anti-abortion charity said this could encourage "unwise" behaviour.
If you are thinking about which contraception to use following the birth of your baby, GP Kate Nicholson says you can use condoms immediately after your have a baby, because not all the types of contraception are suitable when you're breastfeeding.
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