This may be interpreted allegorically, for these women represent two covenants. One is from Mount Sinai, bearing (gennōsa | γεννῶσα | pres act ptcp nom sg fem) children (gennōsa | γεννῶσα | pres act ptcp nom sg fem) to be slaves; she is Hagar.
Reference
Galatians 4:24
Sequence
51