Birthmoms from the 1960's please respond

My husband is an adoptee born in 1965. He is contemplating searching for his birthmother. Aside from curiosity, he has some medical issues that he would like some history on. His birthmom was 22 years old and single in 1965. What are the chances that she had even told anyone she was even pregnant? What was it like in the 1960's to be single and pregnant? How did society treat you? Did you feel coerced into placing your baby? If you never told anyone you were pregnant, would you ever want to be found? What would prevent a birthmom from NOT wanting to be found. When do you think about your child the most? If found, would you want a relationship with your child (now of course grown up) What about grandchildren? What is the one thing you would want your child to know about you? Thanks,Julie