crellow4
Well-Known Member
http://www.google.com/url?q=http://...kQFjAE&usg=AFQjCNHhMKsp1speFMFrR1B3K2d2DWcJHw
This article makes some good points.
This article makes some good points.
PG injections in the shy breeding mare
- Thread starter Delicious_D
- Start date
Delicious_D
Well-Known Member
Dee is very quiet in her heats, the only reaction i ever have had is shes stuffy to ride, thats all. Shes highly strung as it is so being 'that time of the month' is no different then normal.
SF i am so reieved im not the only one to read that as Dom periignon
. I dont feel so bad now 
Its very exciting and i reay do appreicate all the help and support you have given me. I might be letting my heart rule my head, but im hoping for the best all the same. I love this time of year! My facebook is already filled with foal pictures, so cute and also, not helping. lol
SF i am so reieved im not the only one to read that as Dom periignon
. I dont feel so bad now Its very exciting and i reay do appreicate all the help and support you have given me. I might be letting my heart rule my head, but im hoping for the best all the same
. I love this time of year! My facebook is already filled with foal pictures, so cute and also, not helping. lol
Delicious_D
Well-Known Member
right...ill give you three guesses whos come into season tonight....
crellow4
Well-Known Member
I thought you said she'd already ovulated? She may be showing the signs of being in season, but if she ovulated at the beginning of the week there is nothing further you can do at this point.
This might help;
The oestrous cycle has two components:
1. oestrus (heat) in which the mare is receptive to the stallion and the ovum is shed or ovulated. Oestrus usually lasts 4-7 days but the length is very variable. Oestrus periods are longest in spring (i.e. first heat of year). Oestrus usually ends approximately 24 hours (0-48 hours) after ovulation. The changes in the reproductive tract and in the mares behavioural patterns are under endocrine and psychological control. Because the oestrus period is characterised by the rapid development of the follicle that will release the oocyte at ovulation, this period is also known as the follicular phase of the cycle.
2. dioestrus which is a period of sexual quiescence. During this 14-16 day period the mare will not accept mating by the stallion. However, there are many changes occurring in the ovary and uterus during the dioestrus period. Immediately after oestrous, the ovary and uterus set about establishing a suitable environment for the foetus. The ovary supplies one of the hormones, progesterone, that are required for the early establishment of pregnancy.
Figure 2: Rough Diagrammatic Outline of the Events that Occur During Oestrus and Dioestrus Phases in the Mare.
Progesterone is supplied from a structure called the corpus luteum, which develops from the follicle from which the ovum was shed. Progesterone prevents the mare from coming back in heat and also stimulates the lining of the uterus (the endometrium) so that it can receive and promote the development of the foetus. It is important to remember that all of these changes take place, regardless of whether the mare is pregnant or not. What happens subsequently depends on whether the mare has successfully conceived or not.
Cycle length
This is defined as the interval between two successive oestrous ovulations. This is a more accurate measurement than the end of one heat to the end of the next. Cycle length is usually 21 ± 2 days but it is very variable. The oestrous cycle typically lasts 21 days (five days of oestrus and 16 of dioestrus).
Longest cycle length occurs in spring.
If cycle length is shorter than 18 days
suspect endometritis.
Anoestrus
Prolonged period of ovarian inactivity. Usually occurs in winter and early spring, depending on mare and management system. Anoestrous can occasionally occur in summer, especially in lactating mares. There may be small follicles up to 15 mm in ovaries. However, these are not ovulated and so there will not be a functional corpus luteum (CL).
Transitions from anoestrus to regular cycles (vernal transition) occurs in late winter or early spring, depending on mare and management. The transitional period is characterised by distinctive reproductive and behavioural patterns. For instance, during this period, the ovaries are becoming active. However while follicles begin to develop, they do not reach maturity and ovulation does not occur.
· Variable follicular activity with many follicles, some reaching ovulatory size before becoming atretic;
· Erratic oestrous behaviour. Oestrus behaviour may last more than a month before the first ovulation occurs.
Interoestrus
Describes the interval between two successive heats. Usually 14-16 days in length, but may be longer early in the year. May be short if CL lysed due to endometrits or after prostaglandin (PG) administration.
This might help;
The oestrous cycle has two components:
1. oestrus (heat) in which the mare is receptive to the stallion and the ovum is shed or ovulated. Oestrus usually lasts 4-7 days but the length is very variable. Oestrus periods are longest in spring (i.e. first heat of year). Oestrus usually ends approximately 24 hours (0-48 hours) after ovulation. The changes in the reproductive tract and in the mares behavioural patterns are under endocrine and psychological control. Because the oestrus period is characterised by the rapid development of the follicle that will release the oocyte at ovulation, this period is also known as the follicular phase of the cycle.
2. dioestrus which is a period of sexual quiescence. During this 14-16 day period the mare will not accept mating by the stallion. However, there are many changes occurring in the ovary and uterus during the dioestrus period. Immediately after oestrous, the ovary and uterus set about establishing a suitable environment for the foetus. The ovary supplies one of the hormones, progesterone, that are required for the early establishment of pregnancy.
Figure 2: Rough Diagrammatic Outline of the Events that Occur During Oestrus and Dioestrus Phases in the Mare.
Progesterone is supplied from a structure called the corpus luteum, which develops from the follicle from which the ovum was shed. Progesterone prevents the mare from coming back in heat and also stimulates the lining of the uterus (the endometrium) so that it can receive and promote the development of the foetus. It is important to remember that all of these changes take place, regardless of whether the mare is pregnant or not. What happens subsequently depends on whether the mare has successfully conceived or not.
Cycle length
This is defined as the interval between two successive oestrous ovulations. This is a more accurate measurement than the end of one heat to the end of the next. Cycle length is usually 21 ± 2 days but it is very variable. The oestrous cycle typically lasts 21 days (five days of oestrus and 16 of dioestrus).
Longest cycle length occurs in spring.
If cycle length is shorter than 18 days
suspect endometritis.
Anoestrus
Prolonged period of ovarian inactivity. Usually occurs in winter and early spring, depending on mare and management system. Anoestrous can occasionally occur in summer, especially in lactating mares. There may be small follicles up to 15 mm in ovaries. However, these are not ovulated and so there will not be a functional corpus luteum (CL).
Transitions from anoestrus to regular cycles (vernal transition) occurs in late winter or early spring, depending on mare and management. The transitional period is characterised by distinctive reproductive and behavioural patterns. For instance, during this period, the ovaries are becoming active. However while follicles begin to develop, they do not reach maturity and ovulation does not occur.
· Variable follicular activity with many follicles, some reaching ovulatory size before becoming atretic;
· Erratic oestrous behaviour. Oestrus behaviour may last more than a month before the first ovulation occurs.
Interoestrus
Describes the interval between two successive heats. Usually 14-16 days in length, but may be longer early in the year. May be short if CL lysed due to endometrits or after prostaglandin (PG) administration.
Delicious_D
Well-Known Member
The vet who scanned her thought she had, but it wasnt our repo vet, she tried to break out to the stallions this afternoon and have been squirting like crazy, the YO called to let us know.
On another note, are you still intersted in Multicolour? Someone posted on facebook the stud is having an open day 23rd of March (http://www.brackenspastud.co.uk/PBN...kenspa-stud-farm-T0/brackenspa-stud-farm.html).
On another note, are you still intersted in Multicolour? Someone posted on facebook the stud is having an open day 23rd of March (http://www.brackenspastud.co.uk/PBN...kenspa-stud-farm-T0/brackenspa-stud-farm.html).