Miscarriage refers to the death of a fetus during pregnancy, with the most common cause being infection. It may also be caused by hormonal shifts or abnormalities. In many cases, there are no visible signs of miscarriage. If miscarriage is suspected, ultrasound is used to assess the pregnancy and determine whether the fetuses are alive. Finding a cause for the miscarriage, especially if that cause is a treatable condition, may improve outcomes in future pregnancies.

Mastitis is a term used to describe inflammation of a mammary gland (breast), most frequently seen in the postpartum period after a cat gives birth. In most cases, mastitis is caused by a bacterial infection. Trauma to the nipple or teat canal can allow bacteria to enter, traveling up into the mammary gland and creating a bacterial infection. Most cats with mastitis can be treated on an outpatient basis with oral antibiotics and pain medications, though severe cases may require hospitalization or surgery.

Male infertility refers to the inability of a sexually mature tomcat (intact male cat) to impregnate a fertile female. This handout explains the possible causes of infertility in male cats as well as how they may be diagnosed and, when possible, treated.

Infertility in a queen (an intact female cat) is defined as the inability to give birth to live kittens, despite appropriate breeding with a fertile male.This handout provides an outline of common causes of infertility along with how they are diagnosed and, when possible, treated.

Special attention needs to be given to a cat’s nutrition before and during her pregnancy to promote a healthy birth and healthy kittens. It is important to maintain a good body condition throughout pregnancy as her weight increases. A good quality kitten or all life stages diet is recommended during the entire pregnancy; ideally one evaluated using feeding trials. This diet is usually fed throughout the lactation period, but attention to body condition is essential here as well, and the diet may need to be restricted if there is a small number of kittens or the cat starts becoming overweight. Weaning is usually aided by feeding significantly less food for a few days while restricting access to nursing to decrease milk production.