When do labor pains start in a cat? - briefly
Labor pains in cats typically begin during the last week of pregnancy. The exact onset can vary, but it generally occurs around day 63-65 from conception.
When do labor pains start in a cat? - in detail
The onset of labor pains in cats, scientifically known as parturition, is a complex process regulated by hormonal changes and physical developments within the mother's body. To understand when labor pains start, it is essential to grasp the intricate stages leading up to this critical event.
In the final days of pregnancy, which typically lasts about 64-67 days from conception, the cat's body undergoes several preparatory changes. The mammary glands begin to enlarge and produce colostrum, a pre-milk substance rich in antibodies that will provide crucial immunity for the newborn kittens. This process is stimulated by the hormone prolactin, which starts to increase in the mother's bloodstream around day 40 of pregnancy.
Around two days before labor commences, the cat may exhibit behavioral changes indicative of her approaching delivery. These can include nesting behaviors such as digging or pawing at bedding materials, seeking out quiet and secluded spots to give birth, and becoming more restless or agitated than usual. Additionally, the cat's body temperature may drop slightly, which is a normal physiological response that helps prepare her for labor.
The initiation of labor in cats is primarily governed by the interplay between two crucial hormones: progesterone and cortisol. Progesterone, produced by the placenta, maintains the pregnancy by inhibiting uterine contractions. As the due date approaches, the placental production of progesterone decreases, which allows for the onset of labor. Concurrently, the adrenal glands start to secrete cortisol, which stimulates the release of prostaglandins from the uterus. Prostaglandins play a vital role in softening and thinning the cervix, facilitating its dilation, and initiating contractions that will help expel the kittens.
Once labor begins, the cat may experience discomfort or pain as her body works to deliver the kittens. These pains are typically characterized by rhythmic contractions of the uterine muscles, which become stronger and more frequent over time. The exact onset and duration of these contractions can vary among individual cats, but they generally follow a consistent pattern that allows for the safe delivery of each kitten.
In summary, the start of labor pains in a cat is preceded by a series of hormonal and behavioral changes that collectively prepare her body for the birthing process. By understanding these intricate stages, pet owners can better anticipate and support their feline companions during this crucial time.