Birth Control Pills Act as Contraceptives by

Multiple Choice

Birth control pills act as contraceptives by

A) preventing development of the endometrium into a suitable site for implantation
B) preventing ovulation by inhibiting GnRH and thus FSH and LH secretion
C) killing sperm
D) precipitating in the cervical canal to act as a barrier to sperm entry
E) increasing muscular contractions in the female reproductive tract so that ovulated eggs are flushed out before they have a chance to be fertilized