ash i have read that too that your really fertile after birth! because everything is still all 'open'.. and you can deff fall preg while BFing
if you read other sites it says that its very easy to fall preg in the 1st months after birth and that the whole BF contraception thing is a myth!
i know a girl who has a 3 month old baby, and wasnt getting her period so she didnt think she could fall preg, but she did!