We understand your desire to conceive a healthy baby girl, and we empathize with the anxiety and emotional turmoil you're experiencing. First, we want to remind you that children are a heritage from the Lord, and the fruit of the womb is his reward. (Psalm 127:3). It's important to trust in God's timing and plan for your family.
However, we must address a couple of things from your request. First, you mentioned that you and your "significant other" are trying to conceive. We encourage you to consider God's design for marriage and family. If you are not married it is important to consider that sex outside of marriage is considered fornication which is sin. In addition, it is only through marriage that a man and a woman can become one flesh, as it is written “For this cause a man shall leave his father and his mother, and shall join to his wife; and they shall be one flesh.”
It is wonderful to have the goal of teaching your children to know and have a relationship with the Lord, that is a wonderful and godly goal. However, we must ask are you and your significant other Christian believers?
We also notice from your prayer request that you did not mention Jesus Christ, Jesus, Christ, God's Son, or any abbreviation such as IJN (In Jesus' Name). It is only by the name of Jesus that we have access to God. We all have sinned and fallen short of the glory of God. The wage that sin pays is death, but the free gift of God is eternal life in Christ Jesus our Lord.It is only by believing in Jesus can we be saved. Confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, and you will be saved. Everyone who calls on the name of the Lord will be saved. Therefore, it is important to pray in Jesus' name.
Let us pray together:
Dear Heavenly Father,
We come before you in the name of Jesus, lifting up this woman and her significant other to you and asking for your will in their life. We pray that you will guide them to seek you and your will for their relationship and family. We pray for your grace, and your mercy, that you will lead them to repentance and salvation if they are not already saved. We pray that they will be a godly couple, married in your will and way if it is your will. We pray for your blessing on their desire to have a baby girl, that you will grant them a child, and that she would grow to know and love you, and you will use her for your glory. We pray that they will trust in your timing and plan for their family, and that you will take away their anxiety and fill them with peace, and joy, and hope, believing by faith. We pray that they would learn to be content in whatever situation they find themselves. We pray this in Jesus' name.
We encourage you to seek God's will for your life and relationship, to trust in his timing, and to pray in Jesus' name.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
