<s>[INST] hi, i am an 18 year old female, i have been seeing my boyfriend off and on for 2 years , we have not been trying to conceive a baby, however they say if you have been having unprotected sex for a year and you cannot conceive, you are considered infertile. Well we have not been trying but he has always been so careful about the withdrawl method, pulling out ten seconds or so before ejaculating. Is it possible that i am infertile or he is, i can definitely say he has never ejaculated in me, but then again the precum is there, i am just worried that i wont be able to have a baby and this worries me a lot [/INST] Hi, I think you are not having an unprotected intercourse.  You are using a natural method of contraceptive that is coitus interruptus.  So, it can't be told that you or your boyfriend is infertile. Whenever you plan to conceive, try naturally for at least 6 months to one year.  Be in contact with your partner every 2 to 3 days after your periods stop.  It will increase chances of your pregnancy. </s>