Help- Transfer 1 or 2 embryos

We are doing IVF - DE.

We had 22 eggs - 20 fertilized- 7 blasts - 5 normals

2 girls and 3 boys

We have a baby boy 3y/o and would love to have a baby girl. We thinking if we transfer 1 or 2 girls. Just afraid if I transfer my 2 girls I will "waste" my girls. Feel free to post your experience of transfering embryos.

Any suggestions is appreciated. Thank you very much!