Which statement is correct?

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    Birth control pills are composed of estrogen and prevent pregnancy by preventing implantation of the embryo.
    Birth control pills are composed of gonadotropin inhibiting hormone and prevent pregnancy by inhibiting maturation of the follicles.
    Birth control pills are composed of estrogen and synthetic progesterone and prevent pregnancy by preventing follicle development and ovulation.
    Birth control pills are composed of FSH and prevent pregnancy by stimulating development of a mature follicle and ovulation before the embryo can implant in the endometrium.
    Birth control pills are composed of prolactin and prevent pregnancy by fooling the body into "thinking" its pregnant..
asked May 19, 2013 in Biology by anonymous
    

1 Answer

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Birth control pills are composed of estrogen and synthetic progesterone and prevent pregnancy by preventing follicle development and ovulation.
answered May 20, 2013 by Bioshare ~Top Expert~ (34,070 points)

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