information:classification, linguistic:translation, structural:scholar_edition, stylistic:style_transfer, structural:summarization
Combined infertility

In some cases, both the man and woman may be infertile or subfertile, and the couple's infertility arises from the combination of these conditions. In other cases, the cause is suspected to be immunological or genetic; it may be that each partner is independently fertile but the couple cannot conceive together without assistance.