Genesis 25:26

Isaac and Rebekah had twins when Isaac was 60.  They didn’t have kids after being married 20 years, and even though that may have seemed like a long time to them, you don’t hear people discussing how long it took them to have kids, just that they had Jacob and Esau.  If you’re going through a difficult time and think it will never end, pray to the Lord and wait patiently for Him to help you.