Thanks for writing to us.
Having pain in lower back or abdomen during menstruation
is common and is seen in most of the females. As you are having difficulty conceiving, you need to meet a gynaecologist so that both you and your wife can be investigated for any causes of infertility
. In males the quantity as well as quality of sperm matters. We look for number, morphology, motility of sperms. Similarly your wife too should be evaluated for any cause of infertility. Sometimes both the partners are completely healthy but not able to conceive. In all the above mentioned scenario, your gynaecologist would properly guide you.
Hope this helped