How does this even happen!!?!??

I just don’t understand how is it so easy for some people to get knocked up? not once, not twice, but several time!!And for me I can’t even once 😩 I’m a person of faith and pray to god that he will bless me with a bundle of joy, but nothing. Not only does things like this question my faith but it’s extremely discouraging. Does anybody else ever feel this way?