Melaveh Malka:[1]

It is said in the name of Harav Elimelech Milizensk that it is a Segula for women to have an easy birth if they eat a food in honor of the Mitzvah of Melaveh Malka. They are explicitly to state they are eating the food out of respect for this meal.

[1] Divrei Yitzchak 61; Minchas Shabbos Hosafos 98; Orchos Chaim 300:2; Kaf Hachaim 300:4; Shevach Habris 1:8; Nitei Gavriel 56:10