Výsledky vyhledávání - "Joao Paulo N. Martins"

Akademický článek

Is pregnancy loss initiated by embryonic death or luteal regression? Profiles of pregnancy-associated glycoproteins during elevated progesterone and pregnancy loss

Autor: Rafael R. Domingues, Joao Paulo N. Andrade, Thiago O. Cunha, Guilherme Madureira, Uzi Moallem, Victor Gomez-Leon, Joao Paulo N. Martins, Milo C. Wiltbank

Publikováno v: JDS Communications, Vol 4, Iss 2, Pp 149-154 (2023)

Because progesterone (P4) is essential for pregnancy establishment and maintenance, we investigated the effect of increased concentrations of P4 on embryonic attachment and concentrations of pregnancy-associated glycoproteins (PAG). Additionally, we

Externí odkaz: https://doaj.org/article/b7d33137afd7456bbe72f9568b68dcc5

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Akademický článek

Effect of 200 µg of gonadorelin at the first gonadotropin-releasing hormone of the Resynch-25 on ovarian dynamics and fertility in lactating Holstein cows

Autor: Iago M.R. Leão, Marcelo S. El Azzi, Everaldo Anta-Galván, Teresita Valdés-Arciniega, João Paulo N. Martins

Publikováno v: Journal of Dairy Science, Vol 107, Iss 5, Pp 3319-3334 (2024)

ABSTRACT: Our objective was to determine the effect of a 200-µg dose of GnRH 25 d after previous artificial insemination (AI) in a Resynch-25 resynchronization program on ovulatory response, circulating progesterone (P4) concentrations before and af

Externí odkaz: https://doaj.org/article/51b75c7b29094cf9ae56fdf16ba96063

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Akademický článek

Effect of inducing accessory corpus luteum formation with gonadotropin-releasing hormone or human chorionic gonadotropin on the day of embryo transfer on fertility of recipient dairy heifers and lactating cows

Autor: Marcelo S. El Azzi, João Luiz Cardoso, Raul A. Landeo, José Henrique F. Pontes, José C. de Souza, João Paulo N. Martins

Publikováno v: JDS Communications, Vol 4, Iss 2, Pp 155-160 (2023)

The objective was to determine the effect of inducing an accessory corpus luteum (CL) using GnRH or human chorionic gonadotropin (hCG) on the day of in vitro-produced (IVP) embryo transfer (ET) on pregnancy per ET (P/ET) and calving/ET in dairy heife

Externí odkaz: https://doaj.org/article/bf8ec9290e62431a983b43b445151787

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Akademický článek

Effects of human chorionic gonadotropin on the last day of a 5-day CIDR Synch protocol and 5 days later on circulating progesterone concentrations and luteal area in Holstein heifers

Autor: Marcelo S. El Azzi, Teresita Valdes-Arciniega, Everardo Anta-Galvan, Iago M.R. Leão, Rodrigo V. Sala, Meliton Fosado, José C. de Souza, João Paulo N. Martins

Publikováno v: JDS Communications, Vol 3, Iss 5, Pp 368-372 (2022)

The objective was to determine the effect of replacing GnRH with human chorionic gonadotropin (hCG) on the last day of a 5-d CIDR Synch protocol (d 0) and inducing accessory corpus luteum (CL) formation with hCG 5 d later (d 5) on serum progesterone

Externí odkaz: https://doaj.org/article/07c87c860e394f2dbb5998df9094c29c

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Akademický článek

Accessory corpus luteum induced by human chorionic gonadotropin on day 7 or days 7 and 13 of the estrous cycle affected follicular and luteal dynamics and luteolysis in lactating Holstein cows

Autor: Thiago O. Cunha, Leah R. Statz, Rafael R. Domingues, João Paulo N. Andrade, Milo C. Wiltbank, João Paulo N. Martins

Publikováno v: Journal of Dairy Science, Vol 105, Iss 3, Pp 2631-2650 (2022)

ABSTRACT: Our objective was to determine the effect of inducing an accessory corpus luteum (CL) with human chorionic gonadotropin (hCG; 3,300 IU) on d 7 (hCG7) or 2 accessory CL with hCG on d 7 and 13 (hCG7+13) of the estrous cycle in noninseminated

Externí odkaz: https://doaj.org/article/abccf390aee0446e9a85e450ede98d45

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