Dear Rabbi, Are there any special prayers and/or tehilim which husband and wife can say when they are trying to have a child? I know that Hashem answers our prayers in the right time, I just thought that prayers for having a child even a certain time before the child is conceived might effect the spiritual well-being of the child? Thank you!

Any prayer of any kind and in any language said from the depth of ones heart, helps and brings blessing. There are some prayers printed at the end of some Tehilim books. Rabbi Ro'i Margalit