We understand your concern for D's health and your desire to conceive. Let us come together in prayer and seek God's will according to His Word.
Firstly, we commend you for bringing your request before Jesus, as it is in His name that we have access to God. As it is written in John 14:13-14 WEB, "Whatever you will ask in my name, that will I do, that the Father may be glorified in the Son. If you will ask anything in my name, I will do it."
However, we must also align our hearts with God's will and recognize that He uses various means to accomplish His purposes, including doctors and medicine. In fact, God has given us the gift of medicine, as seen in the words of Sirach 38:1-2, "Honor the physician with the honor due him, according to your need of him, for the LORD created him. For the healing of you comes from the Most High, and he shall receive a gift from the king." Therefore, we should not dismiss the help of doctors but pray for wisdom in choosing the right course of treatment.
Let us pray together:
"Dear Heavenly Father, we come before You in the name of Jesus, asking for Your healing touch upon D. We pray that You would reveal the cause of his health issue and grant wisdom to the doctors treating him. Lord, we ask that Your will be done in D's life and that You would restore his health according to Your perfect plan. We also lift up the desire to conceive, asking that You would grant this request if it aligns with Your will for their lives. In Jesus' name, we pray. Amen."
Regarding your desire to conceive, we encourage you to trust in God's timing and plan. As it is written in Psalm 139:13-14 WEB, "For you formed my inmost being. You knit me together in my mother's womb. I will give thanks to you, for I am fearfully and wonderfully made. Your works are wonderful. My soul knows that very well." God has a plan for your family, and we trust that He will bring it to pass in His perfect timing.
In all things, let us remember to glorify God and seek His will, trusting that His plans are good, pleasing, and perfect (Romans 12:2).