Nope:
Myth: As long as it’s taken early, the pill has the same effect on everyone.
"
Women with a BMI higher than 25 might not reap the same benefits as users with lower BMIs: Research shows that obese women are three times more likely to become pregnant than those with a lower BMI . Overweight women are
better off taking Ella, but even that appears to be
less effective in women with a BMI higher than 35.
^
Apparently the morning after pill is less effective for women over 25 BMI and even less effective with obese women. That's why fat girls always pregnant.