Book contents
- A Textbook of Clinical Embryology
- A Textbook of Clinical Embryology
- Copyright page
- Contents
- Frontispiece
- Chapter Co-authors
- Acknowledgments
- Section 1 Physiology of Reproduction
- Section 2 Assisted Reproductive Procedures
- Chapter 6 Hormonal Ovarian Treatment
- Chapter 7 Luteal Support
- Chapter 8 Ovum Pickup (OPU)
- Chapter 9 In Vitro Fertilization (IVF)
- Chapter 10 Embryo Culture
- Chapter 11 Embryo Transfer
- Chapter 12 Cryopreservation
- Chapter 13 In Vitro Maturation (IVM)
- Chapter 14 Biopsy of Testicles
- Chapter 15 Donation and Surrogacy
- Section 3 Genetics and Preimplantation Genetic Testing
- Section 4 IVF Laboratory
- Index
- References
Chapter 6 - Hormonal Ovarian Treatment
from Section 2 - Assisted Reproductive Procedures
Published online by Cambridge University Press: 05 March 2021
- A Textbook of Clinical Embryology
- A Textbook of Clinical Embryology
- Copyright page
- Contents
- Frontispiece
- Chapter Co-authors
- Acknowledgments
- Section 1 Physiology of Reproduction
- Section 2 Assisted Reproductive Procedures
- Chapter 6 Hormonal Ovarian Treatment
- Chapter 7 Luteal Support
- Chapter 8 Ovum Pickup (OPU)
- Chapter 9 In Vitro Fertilization (IVF)
- Chapter 10 Embryo Culture
- Chapter 11 Embryo Transfer
- Chapter 12 Cryopreservation
- Chapter 13 In Vitro Maturation (IVM)
- Chapter 14 Biopsy of Testicles
- Chapter 15 Donation and Surrogacy
- Section 3 Genetics and Preimplantation Genetic Testing
- Section 4 IVF Laboratory
- Index
- References
Summary
At the beginning of the menstrual cycle, there is an increase in bioactive follicle-stimulating hormone (FSH) levels, a stimulus for the growth and differentiation of follicular granulosa cells (GCs). GC steroidogenic enzymes are also inducible by FSH and are necessary for the production of estradiol (E2) and progesterone (P4), as well as expression of luteinizing hormone (LH) receptors on theca cells (TCs). LH then stimulates theca cells to produce androgens, which are metabolized to E2 by GCs under the influence of FSH. Elevated levels of E2 then inhibit FSH secretion, providing a negative feedback effect. Growth of the leading follicle continues owing to elevated levels of FSH receptors, whereas secondary follicles with fewer FSH receptors undergo atresia. Taken together, FSH and LH work in concert, as depicted by the classic two-cell (TC and GC), two-gonadotropin (FSH and LH) theory.
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- Information
- A Textbook of Clinical Embryology , pp. 71 - 84Publisher: Cambridge University PressPrint publication year: 2021