It might be a bit weird to connect orgasm on how to get pregnant. However, there are some studies that would show that when a woman reaches orgasm, it aids in the travel of the sperm going to the egg cell. There are some contractions that will help in the process. Thus, if you want to get pregnant you have to make sure that you achieve orgasm. It might be a bit weird for some couples since usually, the guys are the ones who get to achieve orgasm first. Thus, if there is a need to work it out more in order for the girl to achieve orgasm, it has to be done.
For those who have been trying out for a long time but are not yet successful up to this point in time, the key might be to enjoy your sex. This might seem not a cool idea, but this worked out for some others.