Fertilization of the ovum takes place in which part of the fallopian tube?
a. Interstitial portion
b. Ampulla
c. Isthmus
d. Infundibulum
B
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A The interstitial portion runs into the uterine cavity. This area is too close to the
uterine body for fertilization to occur; it would lead to improper placement for
implantation.
B The ampulla is the wider middle part of the tube lateral to the isthmus and is
where fertilization occurs.
C The isthmus is the narrowest portion of the tube.
D The infundibulum is the end of the tube that opens into the abdominal cavity.
Fertilization at this area may lead to an abdominal pregnancy.
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