Decades ago, it was a tradition among the Chinese to engage in fowl play as part of the wedding ceremony for a newly-married couple.
After the formalities were done at the groom’s place, the wedding party would go to the bride’s home for the rituals at the maternal side. Accompanying their return to their matrimonial home would be a rooster and a hen, which would then be released under the newly-weds’ nuptial bed. If the rooster emerged first, that “augured” the first-born child would be a son, if the hen came out first, then a daughter.
In Chinese these are called 带路鸡 (or ‘chua lor kay’ in Penang Hokkien)
These days I believe most couples would chicken out at the prospect of having two live specimens foul up their love nest; don’t worry there are lots of mock ones available.