Hallow Dear, Precum is pre-ejaculation secretion which is expelled out unknowingly. It does contain some sperms which can cause pregnancy. However, you had this experience 4 days after her period. This day is rather safe as far as the risk of pregnancy is considered. Egg is released 14 days prior to next expected menses. Egg has a life of 24 hours while sperms are active for 3 days. Hence a period of about a week around the day of egg release is considered as fertile window. 4 days after the menses falls quite away from fertile window. Still, I would say, better to err on safer side. Hence, she should take post coital emergency contraceptive pill protection. These pills have to be taken within 72 hours after the unprotected sex. If this period is already over, she may get intrauterine contraceptive device inserted within 5 days of this unprotected sex. This will give her protection from the pregnancy and moreover will give her ongoing contraception for years to come. If 5 days also are over, you cannot do anything now. Just wait for her periods to appear (which mostly she will get). If she misses her period, get pregnancy test done on her urine after one week; earlier the results may be false negative. Alternatively, you may get her blood checked for Beta hCG for diagnosing pregnancy, 10 days after this incidence. If she is pregnant, she can get the pregnancy terminated by medicines safely and effectively up to 9 weeks of gestation. However, this has to be done with Gynaecologists advice and prescription only. And lastly, any step she takes is to be done with her parents consent since she is minor; otherwise it will be an illegal offence. I hope this provides you detailed guidelines. Dr. Nishikant Shrotri