Conceiving naturally

Hi! Has any of you ladies conceived naturally with partner's sperm having abnormal morphology ( defects of the head and neck)? He's currently undertaking tests to see the cause, all other parameters of quantity etc. are normal, but only 1% normal sperm form. He has been reticent to the idea of IUI or IVF when bringing it into discussion. Appreciating any stories or advices. 🙏🏻