Study guide: Test #4Human SexualityFertility:Approximately 300,000,000 sperm are deposited in the vagina, but only 20-200 make it as far as the egg. Be able to discuss the difficulties the sperm encounters along the way in trying to fertilize the egg.
What are some ways to increase the chance of conception?
Male fertility has decreased over the last 50 years. Know some of the causes of male infertility:
What are some reasons this might occur?
How long do sperm need to be able to swim?
What percentage need to be normal in order for a man to be fertile?
Immune reactions sometimes men form antibodies against their own sperm and destroy them
Know the major causes of female infertility:
What could cause this?
oObstruction of the uterus or fallopian tubeWhat can cause this?
Be able to give a brief description of the following.