The continuing obligation of the Ten Commandments—including the Fourth Commandment—is the expectation of the Bible and the majority position of the Reformed churches.
Jesus’ central point thus was that to divorce your spouse so as to free yourself up to potentially marry another is not sufficient grounds for divorce.
As it is clear from Scripture that human beings are endowed with a soul at the moment of conception, the question to which we now return is that of what happens when pre-born babies and infants die.