“My body, my choice” was a specific phrase aimed at allowing a woman to resist a specific form of work (pregnancy) if she does not consent to it. It was never meant to override attempts to protect human beings from other forms of coercion, yet it seems to me that we are now particularly keen to jettison such concerns, if only in matters specifically relating to female bodies. http://www.newstatesman.com/lifestyle/2015/03/why-you-shouldn-t-sell-breast-milk
I saw a recent DNews video using this phrase to defend breast implants. It is frequently used to defend other forms of misogyny like porn, prostitution etc. and trivialize critical analysis of cultural/patriarchal phenomena that is violent and exploitative of women.