Horses Flashcards
How long is the pregnancy of the horse
310-365 days (11 months)
How long is the duration of estrus in mare?
5-7 days
When is the ovulation in mare?
24-48 hours before the end of estrus
How many spermiums do you need to use in the horse?
400-800 millions
How many ml-s of sperm do you need for AI?
10-40 ml (fresh/cooled), 6-10 0.5 ml straws (frozen)
What type of placenta does the mare have?
Epitheliochorial and diffuse
Which hormon is the best for mare cycle synchronization?
Progestagen injection
Which one is an abnormal labor pain?
Violent pains
Instruments or maneuvers, which are not used in ventral position?
Wood planks
What kind of instrument would you not use for the reposition of a
laterally deviated head in the horse?
Caemmerer torsion fork
What is characteristic for Harms dog sitting in horses?
Hoofs of the fetus can perforate the uterine wall
You should not perform embryotomy in case of?
A living fetus
Which method of embryotomy consists of less wiring?
Bayer-Schaetz method
Which one is a correct treatment for low meconium retention in a foal?
Acetylcysteine solution into the rectum, fluid therapy per os and pain control
What is the optimal condition for solving abnormal position and
presentation in large animals?
Epidural analgesia, uterus relaxation, copious lubricant sedatives
According to the chorionic villi distribution, how can we classify the
equine placenta?
Placenta diffuse with microcotyledons
Which could be the consequence of asphyxiate?
Cerebral hemorrhage and edema
When could we talk about retention of fetal membranes in the mare?
After 3 hours post partum
What is the best method for correction of abnormal presentation in large
animals?
The nearest limbs have to be pulled into the birth canal; if the hind and the front legs
are in equal distance we always try for a longitudinal posterior presentation
Which obstetrical snare is not correct to use in the mare?
Jöhnk snare
What is the incorrect method for correction of hock flexion in case of
large animals?
In the case of small fetus extraction without correction
What is the incorrect method for traction without reposition of the hip
flexion in the mare?
In the case of abortion, premature partus or if the fetus is small pull out the fetus with
Jöhnk snare
Which abnormality is an absolute indication for C-section in the mare?
Dorso-transverse presentation
Which is the easiest way to rotate an equine fetus from ventral to dorsal
position?
With Caemmerer torsion fork
Choose the only false statement concerning to the C-section in the
mare:
We open the non-pregnant uterine horn and pull the fetus from the pregnant horn
Choose the only false statement concerning to the C-section in the
mare:
Putting uterine tablets into the lumen provides sufficient protection in the postoperative
therapy
At what gestational age can you first see a heartbeat of an equine
embryo?
25-28 days
At what gestational age should you ideally evaluate a mare for twins?
13-15 days
At what gestational age do the endometrial cups form in the mare?
35-38 days
At what gestational age are we able to determine fetal gender in horse?
60-70 days
What drug would you give this mare today?
hCG
From when can the conceptus be detected in the mare by means of
ultrasonography?
From day 11
Which statement is false in connection with the follicles in mares?
The usual size of a pre-ovulatory follicle is 100 mm in diameter
Which statement is true in connection with the follicles in mares?
At the beginning of the atretic degeneration the size of a follicle still may be 30-40
mm in diameter
Which organ produces eCG:
Trophoblasts cells from endometrial cups
Mare corpus luteum dependent period during pregnancy:
1-180 day
After pregnancy day 180, which organ maintains the pregnancy?
Fetoplacental unit
What is the ovary cancer solving method and what are the symptoms?
Treatment: surgical removal of the affected ovary, normal estrous after 6-8 months.
Symptoms: Nymphomania, stallion-like behavior and prolonged anestrous
How you detect the start of birth in horse?
Hypertrophy of mammary gland
distension of teats (4-6 day prior)
waxing of teats (1-72 hours prior)
CaCO3 increases in milk (1-3 day prior)
How is the recognition of the pregnancy by horses (what factors do they need)?
Movements of the embryo inside the uterus, maternal recognition: INF-like protein,
E1SO4; for us to recognize pregnancy: progesterone, eCG and estrogen
What is the time of ovulation in horse?
1-2 days before end of estrus
When is it good to mate/inseminate horse?
Second day and every other day in estrus
How can you transport horse sperm?
Cooled (in equitainer (1: 70 hours, 2: 48 hours) and iso-thermalizer) or frozen
Why is GnRH implant good for female horse?
It pushes the horse out of its transition period (induce estrous)
When is the capsule development in mare?
From day 6 to day 22-26
What causes the post mating endometritis by horse?
Deposition of semen, bacteria and debris
What causes the acute endometritis in horse?
Streptococcus zooepidemicus (75%)
Which mares are mostly prone to infections?
Older mares, those with pooling of urine in vagina or accumulation uterine fluid, mares
with cervix that fail to relax during estrus
What is granulosa cell tumor and why is it important in horses?
It is the most common ovarian tumor. Unilateral, and produces inhibin, which inhibits
function of other ovary as well. Mare gets aggressive, constant anestrus/nymphomania
How do the endometrial cups form in horses?
From chorionic girdle cells around day 35