This video is really worth watching. I can remember as a child in the 1960's that my mother had one store credit card with my dad's name on it. She had no credit to her name at all.
And another woman my mother's age told me about hiding her pregnancy for as long as she could from her employer, a major top-ten communications company, because as soon as they knew she was pregnant in the 1960's she would be let go. That was policy.
So when Donald Trump says things like "the good old days" or "pregnancy is very hard on an employer," you know he is talking about days when women had far fewer rights than they do today.