Question

one common fertility treatment for women is to take medications such as follicle - stimulating and luteinizing hormones to stimulate the ovaries. why does this treatment increase the probability of producing twins or triplets?
a. the hormones can cause multiple sperm to fertilize one egg.
b. multiple unfertilized eggs can be released and fertilized.
c. multiple unfertilized eggs can be stored in the uterus.
d. the hormones can cause multiple eggs to travel to the cervix.

Explanation:

Fertility treatments with hormones like follicle - stimulating and luteinizing hormones stimulate the ovaries to release multiple eggs. If multiple eggs are released, each can potentially be fertilized, leading to multiple fetuses (twins, triplets, etc.). Option A is incorrect as these hormones don't affect sperm fertilizing an egg in this way. Option C is incorrect as unfertilized eggs aren't stored in the uterus in this context. Option D is incorrect as hormones don't cause eggs to travel to the cervix; eggs travel to the fallopian tubes. So the correct reason is that multiple unfertilized eggs can be released and fertilized.

Answer:

B. Multiple unfertilized eggs can be released and fertilized.