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
- Introduction
- Chapter 1 Development of Reproductive Systems at the Embryo Stage
- Chapter 2 Reproductive Puberty
- Chapter 3 Physiology of the Male Reproductive System
- Chapter 4 Physiology of the Female Reproductive System
- Chapter 5 Conception
- Section 2 Assisted Reproductive Procedures
- Section 3 Genetics and Preimplantation Genetic Testing
- Section 4 IVF Laboratory
- Index
- References
Chapter 5 - Conception
from Section 1 - Physiology of Reproduction
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
- Introduction
- Chapter 1 Development of Reproductive Systems at the Embryo Stage
- Chapter 2 Reproductive Puberty
- Chapter 3 Physiology of the Male Reproductive System
- Chapter 4 Physiology of the Female Reproductive System
- Chapter 5 Conception
- Section 2 Assisted Reproductive Procedures
- Section 3 Genetics and Preimplantation Genetic Testing
- Section 4 IVF Laboratory
- Index
- References
Summary
Cervical mucus is a regulator of the sperm transfer from the vagina to the uterine cavity. Estradiol (E2) stimulates the production of large amounts of thin, watery, alkaline acellular cervical mucus with ferning, spinnbarkeit (crystallization), and sperm receptivity. Progesterone (P4) inhibits the secretory activity of cellular mucus and produces low spinnbarkeit and absence of ferning, which is impenetrable by spermatozoa. In midcycle, the cervix softens progressively, the os of the cervical canal dilates, and clear, profuse mucus exudes from the external os. In a few days after ovulation, the cervix becomes firm, and the os closes. The cervix is the first barrier for the sperm to overcome.
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- Information
- A Textbook of Clinical Embryology , pp. 56 - 70Publisher: Cambridge University PressPrint publication year: 2021