Dr. Luke, the author of this Gospel about the life and ministry of Jesus, records some details that give us a better understanding of the events around the birth of John the Baptist and Jesus. Luke reports that Gabrielle told Mary that Elizabeth was six months pregnant at the time of his appearance. Luke also reports that Mary stayed with Elizabeth for three months. (He doesn't tell us if Mary stayed until John was born.) These details help us to understand that God was working at a very real time in the lives of real people. God brought these two women together when they needed each other. Luke gives us details that would be significant to a Doctor and his patient.
God pays attention to the details in our lives. Luke tells us the hairs on our head are numbered. (Luke 12:8). We can trust God to be with us, to watch over us, and to help us face all the challenging situations that come our way. It make take some time before we see what God is doing or realize how He is working in our lives, but He is always working things out for our ultimate good because He loves us and calls us to be His own. (Romans 8:28)