P1130023
Larger fluid accumulations of a physiological origin wffl not bc found in the nonpregnant uterus. Sono-graphically evident secretions in the lumen of the dies-trous uterus can be seen as a indication of endometritis (Adams et al. 1987, Souires et al. 1988). During estrus smali amounts of ffee fluid may be seen as physiologic, but larger ones as pathologic (Fig. 1.50). Immcdiately after mating, the ejaculate can be seen in the uterine lumen (Ginther and Person 1984 c). Mares whose uter-ine hunina were initially closcd, show fluid accumula-tions containing scattered echoes after service (Fig. 131).
The uterine cervix is depicted relatively poorly. Its ul-trasonic image is morę echoic during diestrus and preg-nancy and is therefore easier to recognize than in estrus.
1.3.2 Pregnant uterus
1.3.2.1 Day 9 to 13 of pregnancy
The young conceptus first becomes visible when it fonris a fluid filled vesicle, Jarge enough to be recog-rtized as a found, anechoic sphere on the ultrasound monitor (Fig. 132). Depending upon the quality of the scanner, this is &st possible, with a variation of only a
fcw days, between Days 9 and 13 of prcgnancy (Day 0 * Day of ovulation or last day of scrvice). When using high resolution ultrasonography with a frequcncy of 5 MHz, 3 to 5 mm large conceptuses can be detected as early ąs on Day 9 of gęstation. On Day 10 the blastocyst measures 4 to 7 mm and will be detectable in as many as about 70% of the mares (Ginther 1986). On the Day 11 it reaches 6 to 9 mm and will be visible in nearly all mares (Fig. 1.53 and 1.55). Around Day 12 the concep-tus has a diameter of 10 to 12 mm and can now be detected even with scanners of lesser resolution using 3 to 3.5 MHz frequencies (Ginther 1983 b).
1.3.2.2 Day 14 to 20 of pregnancy
By Day 14 the embryonic veside has a diameter of 14 to 19 mm (Fig. 1.54 and 1.55). The embryonic vesicle is now large enough to make accurate and reliable posi-tive as well as negative diagnoses under field condition of generał veterinary practice, provided 5 MHz ułtra-sonography is used (Kahn and Leidl 1984). Using ultra-sound of lower frequency, this datę may be postponed by a few days (Chevalier and Palmer 1982). The shape of the embryonic vesicle is spherical and the embiyo proper is not yet visible.
Wyszukiwarka
Podobne podstrony:
img0067 WWW.MlDNIGHTlNKBOOKS.COM From the gritty streets of New York City to sacred tombs in the Mid
"REALLY SEXY. SIZZLING KIND OF SEXY... MAKES YOU WANT TO MELT IN THE PROCESS."—BITTEN 8Y B
img0067 WWW.MlDNIGHTlNKBOOKS.COM From the gritty streets of New York City to sacred tombs in the Mid
TABLE3 PERCENTAGE DISTRIBUTION OF BODY PART INJURED REPORTED BY WORKERS IN THE MEATPACKING INDU
Testing indicates that the proportion of people who have had COVID-19 in the U.K. is Iow, but that t
Gilchrist, Rupert Guns of Dragonard FSB rhe sixth savage novel in the DRAGONARD Violence and
CLASSICAL Record Reviews Most of these “smaller" roles. I am sorry to say. are not well taken i
mus dev(7) 39 Now, rcadcr, you liave rcad what others think of my course, and havc seen proof in the
- Poetry was to be found in the Bibie: the resource of samts and angel1. -
03 PALESTINE IN THE TIME OF JESUS PALESTYNA W CZASACH JEZUSA 103 _ PALEST1NE IN THE TIME OFJESUS •
1933 League of Nałions — Treaty Series. 361 Article 2. * 1. Passengers in the
(3) b) The same opposition is found in many pairs of lexical items: these pairs establish a cor
151 -. 2015. The Iron Cage of Liberalism: International Politics and Unarmed Revolutions in the Midd
więcej podobnych podstron