Yes, there are fetility spells on the site. But there are also spells to turn you into impossible creatures or to do impossible things. Point is, not all the spells in the site are legitimate.
You can't cast a spell that will make you pregnant without having sex. It just won't work that way. But, casting spells to increase your chance of having a baby (while, of course,are in a sort of grey area.
As you are very new to this, you should not be casting spells just yet, you should be trying to understand what magic is and how it works, since it is obvious you don't have a firm grasp on that quite yet.
I hope you find what you are looking for.