not what i expected

i just found out that my good friend are expecting their second.  while i am extremely happy for them, it saddens me that we have not had success.  we have been trying since i had gotten back, and nothing to show forth.  we have had some “close calls.”  i just wonder if God has only destined us to have one, which would be very heartbreaking; never saw us with just one child.  prayers needed, wanted, and appreciated.