ttc and the hubby

I tell my husband when my fertile week is, so he knows it's extra important that we have sex. Well, sometimes he gets anxiety during that time. He says it's because he freaks out about ejaculation and how important it is and his heart beats fast and he gets freaked out by the pressure of all of it.

I have already asked him if he is ready to ttc (we have been trying for a year now) and he says of course.

He says that he freaks about that his ejaculation is the key to everything and he gets nervous that it won't work.

Does this happen to other people? What can I do to calm him of this anxiety?