Do you have to have intercourse on the say you ovulate to get pregnant?

Unfortunately my SO and I were not able to BD on the day ovulated. But we did BD 2/6 days In my fertile window. One of the days was one day before my ovulation. Also Glow said that day was the high fertile day. My CM was also watery during those days. But I heard and read some places that you need to have sex on the day you ovulate to get pregnant, while others say you do not. Is this myth true ?