When advising a patient on the use of emergency contraception (EC) with levonorgestrel (LNG), which of the following is correct?

A. f pregnancy does occur post LNG EC use, a teratogenic pattern in the offspring has been noted

B. EC LNG must be used within 12 hours after unprotected heterosexual vaginal intercourse to provide EC benefit. 

C. LNG EC’s use is limited due to a number of common contraindications. 

D. LNG EC use does not result in the interruption of an established pregnancy. 

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