Truth is that, things are changing with time. Before now, our parent hahe certain ages for marriage (19-22), it worked well for them, no doubt about that. But Introducing that now won't perfectly work because by that age, ladies are still "girls" in school struggling to cope and also enjoying freedom from family house. If we say 25-30 at this our era, it might work, it might not work too. Things are tough These days and a lot are to be considered before going into motherhood.
In my humble opinion, motherhood has no age, it should be entered when the person is ready in all wise
That was true my friend.. Sometimes things literally may vary and dependent on woman's ability and how ready a woman can be on entering motherhood.