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 eggs to travel to the cervix.
b. multiple unfertilized eggs can be stored in the uterus.
c. the hormones can cause multiple sperm to fertilize one egg.
d. multiple unfertilized eggs can be released and fertilized.

Explanation:

Fertility treatments with hormones like follicle - stimulating and luteinizing hormones stimulate the ovaries. This stimulation can lead to the release of multiple eggs. If multiple eggs are released and then fertilized, it can result in twins or triplets. Option A is incorrect as hormones don't make eggs travel to the cervix. Option B is incorrect as unfertilized eggs aren't stored in the uterus. Option C is incorrect as these hormones don't cause multiple sperm to fertilize one egg; rather, they cause multiple egg release. Option D correctly explains that multiple unfertilized eggs can be released and then fertilized, increasing the chance of multiple pregnancies.

Answer:

D. Multiple unfertilized eggs can be released and fertilized.