In vitro progesterone production of corpus luteum cells of cows fed low and high levels of beta-carotene.

@article{Pethes1985InVP,
  title={In vitro progesterone production of corpus luteum cells of cows fed low and high levels of beta-carotene.},
  author={Gy. Pethes and Edit Horvath and Margit Kulcs{\'a}r and Gy. Huszenicza and Gy. Somorjai and Bertalan Varga and J. Haraszti},
  journal={Zentralblatt fur Veterinarmedizin. Reihe A},
  year={1985},
  volume={32 4},
  pages={
          289-96
        }
}
Summary Seven cows deficiently supplied with β-carotene were used in an experiment in which 3 animals were given 500 mg synthetic β-carotene daily for two months, while the other 4 cows served as unsupplemented controls. The cows were synchronized with a double injection of PGF2α (30 mg, Enzaprost). At the peak of the second luteal phase the animals were killed. β-carotene and progesterone analyses were carried out from blood samples and corpora lutea. The in vitro progesterone… 
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EFFECT OF VITAMIN A SUPPLEMENTATION WITH OVSYNCH PROTOCOL ON FERTILITY IN REPEAT BREEDER COWS DURING DIFFERENT SEASONS
This study was carried out to determine the effect of supplementation of vitamin A along with Ovsynch protocol on the pattern of estrus, conception rate and serum progesterone and estradiol-17β
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TLDR
In contrast to previous findings no differences in duration of standing oestrus, length of oestrous cycle, plasma progesterone and luteinizing hormone (LH) concentrations and interval between LH peak and ovulation were observed between the groups.
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TLDR
It is concluded that small lutesal cells may be the principal source of luteal progesterone production in the sheep, and LH, which stimulated a maximal 3-4-fold increase in progestersone production by small lUTEal cells, had no significant effect on production by large lute al cells.
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TLDR
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