Pregnancy chances if morning after pill is noneffective

Patient: Hime and my girlfriend had sex , the condom split and imminently after she took the morning after pill . it happened on day 4 of her cycle and she just finished her peroid and after this happend she bled again for a couple hours.her cycle usaly is 29 day sometimes longerwhat is the chance of pregnancy even if the morning after was un effective?

Symptoms: None