In the pro-oestrous stage of the cat’s oestrous cycle, the queen may start showing the first pro-oestrous behaviours, and these could start as early as four months of age. These behaviours include being more vocal than usual, restless and having an increased appetite. She may also show behaviours such as rolling on the floor and rubbing against objects.
During this stage, the ovaries start to form follicles. Unlike in dogs, the vulva of the queen will only enlarge slightly and will appear slightly moist, but will not discharge. The follicle stimulating hormone, oestrogen and other hormones will help the development of the egg in this stage.
This stage of the cycle usually lasts for around one to two days.
Oestrous
During the oestrous stage of the cycle, the cat will show a lot of the same behavioural signs as she did in the first stage. She may also stand in a breeding posture, which consists of crouching with the front legs, and stretching the back legs to hold the rear high. Another behaviour the queen may show is urinating more frequently than usual. Unlike in the first stage, the cat will allow a male cat to mate with her in this stage. This stage can last up to ten days, however if the queen mates with a tom, this stage will last around three or four days. …show more content…
If the cat does mate, luteinising hormone (LH) will be released, which will stimulate ovulation.
Metoestrous and dioestrous
The next stages of the cycle is metoestrous and dioestrous. During this stage, the cat will not accept males to mate with and her behaviour will return to usual. Unlike other males, which continue to ovulate if they do not mate, cats will no longer ovulate if they do not mate as they are induced ovulators.
If the cat mates and is fertilised, progesterone is produced and released by the corpus luteum. If the queen is not fertilised, the corpus luteum will still release progesterone, however the levels of this hormone will reduce more rapidly than during pregnancy. This stage lasts for around two to three weeks, and dioestrous lasts for around 30 to 40 days. If the queen did not mate, and therefore not ovulate, the follicles will break down and the level of oestrogen declines. Anoestrous Anoestrous is the last stage of the oestrous cycle. This is the resting period in which the cat will not be in heat. The queen’s ovaries are inactive during this stage and she will not be attracted to the male cat. As cats are seasonally polyoestrous, this stage would usually take place from September to January, when the hours of daylight are shorter. During this stage, the uterus shrinks in size and repairs. The queen will show usual behaviour during this stage, and it will usually last around two to three months. After the stage ends, the cycle will restart and the pro-oestrous stage will begin again. Horse Copulation When the horse is in heat, it will start ovulating and will also allow a male horse to mate with her. During this time, the horse will show behavioural changes such as restlessness, hyperactivity and frequent urination. Horses are long-day breeders because they are in heat during the spring, when the days increase in length. …show more content…
Rather having five different stages of the oestrous cycle like cats, horses only have two stages of their oestrous cycle- oestrous and dioestrous.
Oestrous
The oestrous stage of the cycle can last anywhere between four and ten days, but usually averages at around six days. During this stage, the pituitary gland is influenced by the increased daylight during spring, which begins the production of follicle-stimulating hormone. This hormone gets released into the blood and travels to the ovaries, beginning the development of a follicle that contains an ovum. This produces oestrogen, which is released into the blood stream.
Luteinizing hormone then causes the ovary follicle to rupture, resulting in ovulation. When the follicular wall ruptures, it carries the ovum out with a fluid.
Mares will show behaviour during the oestrous stage of the cycle to try and attract a stallion to mate with. This behaviour includes raising their tail, squatting, frequent urinating, exposing the clitoris, and allowing copulation.
During this stage, the ovaries start to form follicles. Unlike in dogs, the vulva of the queen will only enlarge slightly and will appear slightly moist, but will not discharge. The follicle stimulating hormone, oestrogen and other hormones will help the development of the egg in this stage.
This stage of the cycle usually lasts for around one to two days.
Oestrous
During the oestrous stage of the cycle, the cat will show a lot of the same behavioural signs as she did in the first stage. She may also stand in a breeding posture, which consists of crouching with the front legs, and stretching the back legs to hold the rear high. Another behaviour the queen may show is urinating more frequently than usual. Unlike in the first stage, the cat will allow a male cat to mate with her in this stage. This stage can last up to ten days, however if the queen mates with a tom, this stage will last around three or four days. …show more content…
If the cat does mate, luteinising hormone (LH) will be released, which will stimulate ovulation.
Metoestrous and dioestrous
The next stages of the cycle is metoestrous and dioestrous. During this stage, the cat will not accept males to mate with and her behaviour will return to usual. Unlike other males, which continue to ovulate if they do not mate, cats will no longer ovulate if they do not mate as they are induced ovulators.
If the cat mates and is fertilised, progesterone is produced and released by the corpus luteum. If the queen is not fertilised, the corpus luteum will still release progesterone, however the levels of this hormone will reduce more rapidly than during pregnancy. This stage lasts for around two to three weeks, and dioestrous lasts for around 30 to 40 days. If the queen did not mate, and therefore not ovulate, the follicles will break down and the level of oestrogen declines. Anoestrous Anoestrous is the last stage of the oestrous cycle. This is the resting period in which the cat will not be in heat. The queen’s ovaries are inactive during this stage and she will not be attracted to the male cat. As cats are seasonally polyoestrous, this stage would usually take place from September to January, when the hours of daylight are shorter. During this stage, the uterus shrinks in size and repairs. The queen will show usual behaviour during this stage, and it will usually last around two to three months. After the stage ends, the cycle will restart and the pro-oestrous stage will begin again. Horse Copulation When the horse is in heat, it will start ovulating and will also allow a male horse to mate with her. During this time, the horse will show behavioural changes such as restlessness, hyperactivity and frequent urination. Horses are long-day breeders because they are in heat during the spring, when the days increase in length. …show more content…
Rather having five different stages of the oestrous cycle like cats, horses only have two stages of their oestrous cycle- oestrous and dioestrous.
Oestrous
The oestrous stage of the cycle can last anywhere between four and ten days, but usually averages at around six days. During this stage, the pituitary gland is influenced by the increased daylight during spring, which begins the production of follicle-stimulating hormone. This hormone gets released into the blood and travels to the ovaries, beginning the development of a follicle that contains an ovum. This produces oestrogen, which is released into the blood stream.
Luteinizing hormone then causes the ovary follicle to rupture, resulting in ovulation. When the follicular wall ruptures, it carries the ovum out with a fluid.
Mares will show behaviour during the oestrous stage of the cycle to try and attract a stallion to mate with. This behaviour includes raising their tail, squatting, frequent urinating, exposing the clitoris, and allowing copulation.