God does things that we cannot imagine, that is what makes Him God! As Gabriel the angel spoke to Mary, he told her something about one of her relatives, and then said something that showed she could believe the otherwise, unbelievable report,

“Now indeed, Elizabeth your relative has also conceived a son in her old age; and this is now the sixth month for her who was called barren. For with God nothing will be impossible” (Luke 1.36–37).

Whatever the age of Elizabeth, she was old and beyond the capability of bearing children. How then could she be in her sixth month of pregnancy? As Gabriel said, “with God nothing will be impossible!” Therefore, do not limit God in your thinking.