Okay I know this is very old but I want to give my two cent
@Thinking Allowed
Yes Jewish girl did married once they start their period, but we still don’t know that Mary was 12-15. And that was he that they enter the first stage of marriage. As one person said, they’re at the second stage of marriage at 15-16, so Mary was 12-15 when she conceived. Another person here said that “ . Maybe. But I'm not convinced that girls were married at ages of 12-14 as a general rule. Yes, young girls were betrothed to young men through family arrangements. However, this act of betrothal is really just a promise that a family gets from another family that their daughter(family 1) will marry their son(family 2).“ We don’t know if 12-14 was the typical age to get married. It could been 14-16 and living with hubby by a year later. Joseph could have delay the wedding a bit, making her a bit older then 14–15. But however old Mary was, she was less then 17 when she conceived.