Contributions of Maternal Serum Progesterone and Estradiol Concentrations or Corpora Luteal and Fetal Number to Mammary Growth and Development of Ewes During Pregnancy

• Main Author: Perpustakaan UGM, i-lib
• Format: Article NonPeerReviewed
• Published: [Yogyakarta] : Universitas Gadjah Mada 1995
• Subjects: Jurnal i-lib UGM
• Online Access: https://repository.ugm.ac.id/26600/; http://i-lib.ugm.ac.id/jurnal/download.php?dataId=9633
• Institution: Universitas Gadjah Mada

ABSTRACT Sixteen ewes with similar weight and age were used m an experiment, and injected twice with PGF2 before being bred. Number of corpora lutea was detennined 5 d after the onset of estrous cycle by laparoscopy. Number of ewes haying 0, 1, 2, 3, and 3 corpora lutea were 3, 2, 5, 4, and 2, respectively. At parturition date, the number of ewes gave birth to 0, 1, 2. 3, and 4 lambs were 3, 6, 4, 2, and l, rcspectivdy. Blood samples were collected every other week during pregnancy for progesterone and estradiol analyses with radiounmunoassay. At parturition date, the experimental ewes were sacrificed and the mammary glands were excised for determination of dry-fat-free tissue (DFF0. Multiple regression and correlation was used to determine the relationships of serum progesterone and estradiol concentrations and of corpora luteal and fetal number with mammary Keywords: Sheep, Corpus luteum, Fetal number, Progesterone, Estradici, Mammary Growth