Zobrazeno 1 - 10
of 51
pro vyhledávání: '"Yoshiyuki Takahashi"'
Publikováno v:
Reproduction in Domestic Animals.
Autor:
Takashi Yamazaki, Soichi Kageyama, Kenichi Takahashi, Hiroki Hirayama, Takashi Fujii, Satoru Moriyasu, Ken Sawai, Kozo Sakamoto, Shigeo Fukuda, Hitomi Yoshino, Hiroyuki Hayakawa, Yoshiyuki Takahashi, Akira Naito
Publikováno v:
The Journal of Reproduction and Development
Artificial insemination with cryopreserved semen is a well-developed technique commonly used for controlled reproduction in cattle. However, despite current technical advances, cryopreservation continues to damage bull spermatozoa, resulting in a los
Autor:
Sung-Sik Kang, Keisuke Koyama, Weiping Huang, Masashi Nagano, Yoshiyuki Takahashi, Yinghua Yang, Yojiro Yanagawa
Publikováno v:
The Journal of Reproduction and Development
The present study aimed to establish an efficient system for bovine embryo production by in vitro fertilization (IVF) that can achieve stable normal fertilization and blastocyst developmental rates in any bull without optimization of the sperm concen
Autor:
Masashi Nagano, Weiping Huang, Yojiro Yanagawa, Yoshiyuki Takahashi, Sung-Sik Kang, Keisuke Koyama
Publikováno v:
Journal of Reproduction and Development. 60:136-142
The objective of this research was to clarify the aging-related changes in in vitro-matured bovine oocytes. Firstly, we examined the fertilization and embryonic development of bovine oocytes after 22 and 30–34 h of in vitro maturation (IVM). The oo
Publikováno v:
The Journal of Reproduction and Development
A high incidence (about 70%) of alteration in endometrial epidermal growth factor (EGF) profile, i.e., loss of 2 peaks on days 2–4 and 13–14, has been linked to a reduced fertility in multiparous repeat breeder Holstein cows. However, the EGF pro
Publikováno v:
The Journal of Reproduction and Development
The objective of this study was to clarify the effects of prematurational culture (pre-IVM) supplemented with 3-isobutyl-1-methylxanthine (IBMX) on nuclear and cytoplasmic maturation of in vitro-grown bovine oocytes. In experiment 1, oocytes (95 μm
Publikováno v:
Theriogenology. 80:793-799
Bovine ovaries offer a large pool of oocytes that could be used for in vitro production of embryos of genetically valuable animals. The effects of in vitro growth (IVG) culture duration (10, 12, and 14 days) on the viability and growth of bovine oocy
Autor:
Yojiro Yanagawa, Shinichi Nakata, Gen Bando, Hideyuki Sakamoto, Masao Kosuge, Masashi Nagano, Yoshiyuki Takahashi, Motozumi Matsui, Daisuke Fukui, Ryohei Nakamura
Publikováno v:
Journal of Reproduction and Development. 59:491-495
Artificial insemination (AI) can help to avoid inbreeding and genetic degeneration for sustaining genetically healthy populations of endangered species in captivity. Collection of a sufficient quantity of viable sperm is an essential first step in th
Autor:
Shogo Higaki, Etsuro Yamaha, Seiji Katagiri, Yuichiro Akashi, Yoshiyuki Takahashi, Kentaro Mochizuki
Publikováno v:
Journal of Reproduction and Development. 56:212-218
The feasibility of cryopreservation of zebrafish (Danio rerio) primordial germ cells (PGCs) by rapid cooling (i.e., vitrification) of dechorionated whole embryos at the 14- to 20-somite stage was investigated. Initially, we examined the glass-forming
Autor:
Yukiko Matsuura, Masatsugu Suzuki, Hideto Okuyama, Shin-ichi Saga, Gen Bandou, Seiji Katagiri, Daisuke Fukui, Yoshiyuki Takahashi, Yojiro Yanagawa, Toshio Tsubota
Publikováno v:
Journal of Reproduction and Development. 55:143-148
In sika deer, the normal method of estimating fetal age, based on fetal weight, is not applicable during the early pregnancy period. The objective of the present study was to describe the growth and development of sika deer fetuses and to establish a