Complex sentence: Even with treatments such as surrogate motherhood, female infertility is caused by the lack of any ova to implant in a surrogate, however male fertility might still be possible if viable sperm is present in the testes and is able to be extracted.
Split into simpler sentences: Even with treatments such as surrogate motherhood, female infertility is caused by the lack of any ova to implant in a surrogate. Male fertility, however, can still be possible if viable sperm is present in the testes and is able to be extracted.