noun
marriage due to pregnancy; shotgun wedding
A marriage that takes place because the bride is pregnant. Similar to できちゃった婚, but 授かり婚 often carries a more positive or euphemistic nuance, emphasizing the child as a gift.
二人は授かり婚で、式のときにはもうお腹が大きかった。
They had a shotgun wedding, and by the time of the ceremony, her belly was already big.
These days, marriages due to pregnancy are not uncommon.