Problems Concerning the Rudimentary Right Ovary in Chicken and Chicken-Embryo

Problems Concerning the Rudimentary Right Ovary in Chicken and Chicken-Embryo PROBLEMS CONCERNING THE RUDIMENTARY RIGHT OVARY IN CHICKEN AND CHICKEN-EMBRYO by M. M. GROENENDIJK-HUIJBERS (Department of Medical Anatomy and Embryology, University of Utrecht, The Netherlands) After sinistral ovariectomy in the young chick the rudimentary right ovary hypertrophies and as a rule develops into a testicular structure. On the basis of this observation BENOIT (1923) and DoMM (1927) as- sumed that the inhibitory action of the left ovary prevents the right gonad from growing. UOTILA (1939), however, suggested that an in- creased release of gonadotrophins causes the compensatory growth. Although experimental evidences are being accumulated in favour of the ovarian inhibition theory, the role definitely played by the pituitary is not fully clarified. In a recent review TABER et al. (1964) attributed to the pituitary a trophic rather than a specific gonadotrophic function. In the chicken embryo sinistral ovariectomy at 4 days of incubation leads to a compensatory growth of the right ovary, visible from the 12th day of incubation onwards (GROENENDIJK-HUIJBERS, 1965). The organ has broadened and thickened and shows an increased number of super- ficial cysts. Microscopically, besides an increase of superficial and deep lacunes, the solid medullary cords as well as the fat laden cell groups http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Netherlands Journal of Zoology (in 2003 continued as Animal Biology) Brill

Problems Concerning the Rudimentary Right Ovary in Chicken and Chicken-Embryo

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Publisher
Brill
Copyright
© 1967 Koninklijke Brill NV, Leiden, The Netherlands
ISSN
0028-2960
eISSN
1568-542X
D.O.I.
10.1163/002829668X00054
Publisher site
See Article on Publisher Site

Abstract

PROBLEMS CONCERNING THE RUDIMENTARY RIGHT OVARY IN CHICKEN AND CHICKEN-EMBRYO by M. M. GROENENDIJK-HUIJBERS (Department of Medical Anatomy and Embryology, University of Utrecht, The Netherlands) After sinistral ovariectomy in the young chick the rudimentary right ovary hypertrophies and as a rule develops into a testicular structure. On the basis of this observation BENOIT (1923) and DoMM (1927) as- sumed that the inhibitory action of the left ovary prevents the right gonad from growing. UOTILA (1939), however, suggested that an in- creased release of gonadotrophins causes the compensatory growth. Although experimental evidences are being accumulated in favour of the ovarian inhibition theory, the role definitely played by the pituitary is not fully clarified. In a recent review TABER et al. (1964) attributed to the pituitary a trophic rather than a specific gonadotrophic function. In the chicken embryo sinistral ovariectomy at 4 days of incubation leads to a compensatory growth of the right ovary, visible from the 12th day of incubation onwards (GROENENDIJK-HUIJBERS, 1965). The organ has broadened and thickened and shows an increased number of super- ficial cysts. Microscopically, besides an increase of superficial and deep lacunes, the solid medullary cords as well as the fat laden cell groups

Journal

Netherlands Journal of Zoology (in 2003 continued as Animal Biology)Brill

Published: Jan 1, 1967

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