The Jewish sages said (partially in explaining a verse in the 5th book of the Bible - chapter 23 verse 2), that it must shoot out like an arrow in order to get a female pregnant. However, based on what almost everyone answered, it seems that things have changed since the times of the Jewish sages, and today it is not a problem.
The impression that semen should "shoot" out of the penis is another misconception that we can thank the porn industry for...obviously there is a wide range of "normal" in this area. It varies not only from man to man, but even within the same man depending on his age, position, time since previous ejacualtion, etc. Also, ask the poor teenage girl who got pregnant when her boyfreind ejacualted OUTSIDE her vagina but on her vulva, if shooting high is necessary for conception!
dont ejaculate for a while and it will shoot out
Don't forget that different positions when ejaculating seems to result in different projecting distances. It's probably not a constant rule, but as a girlfriend I've noticed what positions you have to take cover for (when your partner is not finishing via intercourse). I imagine it works similarly when your partner ejaculates inside you.
As you are "trying to conceive", I assume you both are fairly young, so age is not a problem. Do you give him a handjob so you can see what his ejaculation looks like? How do you know that it doesn't "shoot out" at least some of the time within your vulva? Of course, you're always safe to run this by his physician to check out any possibilities. If you're trying extra hard to conceive, are you overdoing things leading to "system fatigue" from overuse? In the end, I can't top crazywillie's admonition: " . . . the idea is to get the semen into your vagina not blow your brains out." It's early, but I may end up nominating that for the Forum Phrase of the Year!
An example the human penis is like a weapon, a hand pistol does not fire very far on the other hand a canon can send a projectile for miles.
So it goes with a penis, some shoot maybe 6 feet others like my own never worked like that,as with your husband it just pumps out slowly, I have 2 kids so I guess even though its not one of those long distance jobs it did what it was supposed to do, the idea is to get the semen into your vagina not blow your brains out.