Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 7

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  utrzymanie ciazy
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Rola laktogenu łożyskowego (oPL) w utrzymaniu ciąży u owiec wysokoplennych

100%
Wierzchos E., Gregoraszczuk E., Zieba D., Murawski M.
Zeszyty Naukowe. Przegląd Hodowlany
|
1999
|
tom 43
2

Kontralateralna ciaza u krow

100%
Zbylut J., Czeladko J.
Medycyna Weterynaryjna
|
2009
|
tom 65
|
nr 12
830-832
The aim of this paper was the presentation of some problems connected with pregnancies located in the uterine horn contralaterally to the corpus luteum (CL) in cows. Contralateral pregnancies occur very rarely (0.2%) and have a lower chance for development than ipsilateral pregnancy. However, owing to the application of the available biotechnic methods it is possible to introduce the embryo in the uterine horn, contralaterally to the CL and to favor their growth to the time of parturition. Such an action was accomplished even in cows with aplasia of one uterine horn. No statistical differences were found in pregnancy rates after the transfer of a second embryo ipsilaterally or contralaterally to the CL to already inseminated cows. However, better conditions for the development of the pregnancy were on the side of the functional CL even when two fetuses were growing, and the ipsilateral transfer of the second embryo to an already mated cows was a more efficient twin induction technique than a contralateral transfer. The maintenance of an early pregnancy in cows is possible using the exogenous progesterone (P), even in cases of the absence of functional CL on ovary. In cows supplemented with P a spontaneous ovulation can take place along with the establishment of a new CL that is able to maintain the pregnancy. At such a time the formation of CL can be induced pharmacologically. Cows with the newly created CL maintained the pregnancy up to mature parturition, even in cases when the fetus was placed contralaterally to such a corpus. Beneficially for maintaining the pregnancy was the presence on the ovary of accessory CL, independently of the supplementation with P. Their presence limited the occurrence of cases of embryo morality and the abortions of fetuses. Pregnancy losses were not observed in females in which the injection of hCG or GnRH induced the establishment of two new luteal structures. The increase of embryonic survival after bilateral nonsurgical embryo transfer is enabled by the stimulation of recipients with low doses of FSH. This treatment causes the presence of few CL on the ovaries at the day of embryo transfer and enables attaining a high percentage of pregnant females. A considerable portion of them carry twins.
3

Wplyw egzogennego progesteronu na wyniki zacielen w swietle badan klinicznych i endokrynologicznych

84%
Lukaszewski Z., Marcinkowski K., Krolinski J., Lukaszewska J.
Medycyna Weterynaryjna
|
1993
|
tom 49
|
nr 07
322-323
The objective of the examinations performed on 230 cows and 36 embryo recipients was to establish if 1—3 doses of progesterone applied between the 17th and 19th day after insemination or on the 10th day after embryo transfer help the stabilization of pregnancy. After one dose of P4 (250 mg) 51,1% of conceptions were noted, after 2 doses 63,8% and after 3 doses 76,6% of conceptions were observed. In a control group 30,3% of the cows became pregnant. In embryo recipients after one anpplication of an exogenous progesterone at a dose of 125 mg the pregnancy rate was 44,4% as compared to a control group in which the rate was 27,8%. In pregnant cows initial levels of progesterone varied from 1,96 to 8,1 ng/ml. In the group of cows receiving 1 dose of P4 an average increase of the level of progesterone was by 1,1 ng/ml, in the group receiving two injections by 3,36 ng/ml, and in the group receiving three injections of P4 by 4,9 ng/ml. In the control group on the 19th day after insemination in 37,2% of pregnant cows the level of progesterone in blood plasma decreased by an average of 1,65 ng/ml. It can be assumed that the application of exogenous progesterone in inseminated cows with subclinical disturbances of endometrial functions and in embryo recipients positively affects the stanilization of pregnancy.
4

Wspolczesne metody poprawy plodnosci bydla

67%
Ptaszynska M.
Magazyn Weterynaryjny
|
2004
|
tom 13
|
nr 06
32-35
5

Rola cytokin w rozwoju i utrzymaniu ciazy

67%
Krakowski L., Kostro K., Krakowska I., Wrona Z.
Medycyna Weterynaryjna
|
2004
|
tom 60
|
nr 10
1034-1038
6

Od zapłodnienia do implantacji - czyli dialog pomiędzy matką a zarodkiem

67%
Manka M.
Weterynaria w Terenie
|
2017
|
tom 11
|
nr 1
7
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Rola prolaktyny w utrzymaniu ciąży u psów

67%
Max A.
Życie Weterynaryjne
|
2018
|
tom 93
|
nr 06
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.