As the virus attacks the nervous system, infected dogs develop circling behavior, head tilt, muscle twitches, convulsions with jaw chewing movements and salivation (âchewing gum fitsâ), seizures, and partial or complete paralysis. In wildlife, infection with canine distemper closely resembles rabies.
Most cases of female infertility are caused by problems with ovulation. Without ovulation, there are no eggs to be fertilized. Some signs that a woman is not ovulating normally include irregular or absent menstrual periods. Ovulation problems are often caused by polycystic ovarian syndrome (PCOS). PCOS is a hormone imbalance problem which can interfere with normal ovulation. PCOS is the most common cause of female infertility. Primary ovarian insufficiency (POI) is another cause of ovulation problems. POI occurs when a woman's ovaries stop working normally before she is 40.
Approximately 20% of cases of infertility are due solely to male factor, and an additional 30-40% of cases involve both male and female factor. A manâs fertility can be affected by the following factors: 1  Endocrine (hormonal). 2  Chromosomal (genetic) disorders affecting sperm production and/or quality.ur goals in caring for infertile men include: 1  Identifying and treating reversible conditions. 2  Identifying irreversible causes in which assisted reproductive techniques using the male partnersâ sperm can be performed to achieve pregnancy.