Fetal development in cows with multiple fetuses
نویسندگان
چکیده
منابع مشابه
Fetal development in cattle with multiple ovulations.
Treatment of lactating and nonlactating parous cows (n = 379) with 12 mg of FSH-P to evaluate development of multiple bovine fetuses resulted in ovulation rates ranging from 1 to 27 corpora lutea (CL). Fertilization rate (i.e., ova fertilized at 6 to 8 d postmating, 80.0%) was not affected by ovulation rate. The percentage of fetuses developing normally at 51 to 53 d postmating decreased (P les...
متن کاملOvine fetal renal development impacted by multiple fetuses and uterine space restriction.
Intrauterine growth restriction (IUGR) from uteroplacental dysfunction causes impaired nephrogenesis and ultimately hypertension, but it is unknown whether IUGR caused by insufficient space for placental development seen in uterine anomalies and/or multifetal gestation exerts the same effects. Fetal renal development and metabolism were studied in an ovine space-restriction model by combining u...
متن کاملMorphometric development of sphincter of oddi in human fetuses during fetal period: microscopic study.
OBJECTIVE In this study, morphometric developments of the sphincter of Oddi in human fetuses were observed. MATERIAL AND METHODS We observed 113 human fetuses consisting of 67 male and 46 female subjects, whose ages varied between 14 to 40 weeks who showed no signs of any pathology or anomaly externally. The common external measurements of fetuses were carried out, followed by abdominal disse...
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Functional development of the mammary gland occurs during pregnancy. When dairy cows and goats are gestating twins, mammary gland development is amplified due to hormonal signals from the much larger fetal-placental unit. Carrying twins seemingly programs higher milk production to meet the needs of “double the trouble” (Nielen et al., 1989, Hayden et al., 1979). But what if fetal-placental sign...
متن کاملMilk production correlates negatively with plasma levels of pregnancy-associated glycoprotein (PAG) during the early fetal period in high producing dairy cows with live fetuses.
This study was designed to establish possible factors affecting plasma pregnancy-associated glycoprotein (PAG) concentrations during early pregnancy in high producing dairy cows with live fetuses. Blood samples were obtained on days 35, 42, 49, 56 and 63 of gestation from 80 lactating cows in two herds carrying live fetuses. Radioimmunoassay systems were used to determine PAG (RIA-497 and RIA-7...
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ژورنال
عنوان ژورنال: Theriogenology
سال: 1987
ISSN: 0093-691X
DOI: 10.1016/0093-691x(87)90103-8