Suggest possible cases of infertility in humans.

Causes of female infertility include:

• Failure to ovulate so that there is so egg to be fertilized
• Damage to the oviducts, causing tubal blockage. As such, the ovum cannot move to the site of fertilization for the ovary.
• Uterine damage due to events such as uterine fibroids and cancer. The uterus becomes unable to maintain a pregnancy.
• Damage to the cervix, especially as a result of unsafe abortions. The cervix becomes unable to maintain the pregnancy up to birth and most pregnancies end in later miscarriages or premature deliveries.
• Hormonal disorders such as hypopituitarism and hypogonadism.
• Antibodies against sperm so that all he husband’s sperm cells are rejected

Causes of male infertility includes:

• Impotence
• Low sperm count
• Absence of sperm cells in the ejaculated semen (azoospermia)
• Abnormal sperm morphology.
• Abnormal sperm motility.
• Hypogonadism
• Antibodies against the man’s own sperms (autoimmunity)