When My hospital lost all of my vials I didn't think my daughter would have the opportunity for siblings. Then I contacted a family on this site that said they had vials....I bought them and got pregnant with twins! That family already had boy/girl twins. As soon as I got the vials another family contacted me...and she got pregnant and had boy girl twins by the vial I donated to her. Then shortly after another family contacted me...we are hoping that they have the same results as us. 3 families so far with boy girl twins and most of us would never have had that opportunity without this site. Thank you.