Honestly, this seems kind of prurient to me. All we know is that, “After these days, [Zechariah’s] wife Elizabeth conceived.” You could get the idea that she’s a high-bred Charolais cow or something, but she was a human woman who had been through a lot of abuse. Let her alone about the conception; it’s not like she had a choice.
Presumably she greatly wanted to conceive, and the conception was solely through divine grace, because either she or her husband were incapable of conception.
Those aren’t exactly prurient points, they indicate the holiness of John, who was the result of the grace, which was the answer to their prayers, which were presumably jointly made in sincerity.
From the beginning words, I thought I was on a muzzie thread.