when I grew up in west PA....60-70's
You either were male or female
Those are the only two sexes. You are born one or the other, except in extremely rare cases of deformity where indications of both sexes are present.
The word gender isn't even supposed to be applied to people (or any living thing). It's more a language arts term that is applicable in most languages, and used to be in English, too, but English speakers stopped distinguishing gender in words several hundred years ago. Most other languages retained the distinction, but when you are referring to whether a living creature is male or female, the correct word is sex, as in "What sex is the baby?"
Due to the word sex having another meaning (the act of sex), however, folks will usually say it differently, as in, "Did they have a boy or a girl?" Saying "What gender is the baby?" is of very recent origin, and is an incorrect usage of the English language. You should ask what sex the child is. Gender, used correctly, doesn't apply to living beings.
But if you mean gender as a synonym for the word sex, then there are two only.