In a recent interview to Australian television interviewer Andrew Denton, the 62-year-old actress revealed that the educational film had a profound effect on her, at a time when she was also learning about sex from 'nasty' boys.
The Queen also blamed her mother for not being 'born to be a mother', saying 'hurtful, bitchy things' and making it impossible for her to take a boyfriend home.
Mirren, who studied in St Bernard's High School in Southend, said that she was about 13 or 14, when she was shown the film, during a trip to a boys school.
"And they sat us all down, boys and girls, all about 13, 14 years old in this horrible school hall. And then this tweed-skirted dykey sort of woman, short cropped hair, comes on and says, 'I'm Dr Joyce' or whatever, 'and what you're about to see is one of the greatest miracles, the Daily Mail quoted her, as telling Denton.
The actress said that she still remembers the scenes showing a close-up of a woman having a baby.
"And that's all you see and these are 13-year-old boys and girls who can't look at each other anyway, and it's bloody and it's disgusting. And then occasionally a little subtitle comes up because there's no soundtrack. It says, 'Now prepare the rubber sheet,'" she said.
Mirren revealed she was so sickened, that she had covered her face with her hands.
"I swear it traumatised me to this day. I haven't had children and now I can't look at anything to do with childbirth. It absolutely disgusts me," she said.
When asked whether the film was "truly the reason she didn't have kids," Mirren replied, "I think it's a lot to do with it, I think in deep proper psychological terms I was traumatised."