My boyfriend doesn’t believe in trying for a baby?

So my SO and I have been together for almost two years, we also live together and have been for almost a year and tonight the topic of children came up.

So I ask him how long after marriage does he want to try for a baby he replies “he doesn’t “believe” in actively trying for a baby he wants to just have unprotected sex until I happen to get pregnant.”

Like I have my own life timeline and when I want to have children by... So just having unprotected sex and “letting it take its course” doesn’t work for me. He must not understand how hard it is to get pregnant when actually trying to get pregnant? Having sex twice a week won’t cut it especially if we don’t have sex around ovulation.

Anyways this really has me questioning my relationship.

What is your opinion on this?

UPDATE: I really appreciate your comments! I think it would be smart to track myself and initiate sex around ovulation.. but what if I do and he never wants to have sex when I need us to and it takes forever to get pregnant.. what do I say or do in that scenario?