Folliculogenesis

Under the influence of FSH, one 'dominant' follicle grows and matures faster than the others that then degenerate. About 32 hours before ovulation, oestrogen secretion peaks, causing a surge in the production of LH. This triggers the release of the mature egg from the dominant follicle. What remains in the follicle is subsequently transformed into the corpus luteum, which secretes progesterone to prepare the endometrium for implantation. Due to the progesterone, the body temperature rises.

Development, growth & rupture of a dominant follicle during the process of foliculogenesis
Foliculogenesis
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Preovulatory Follicle      Oocyte being extruded

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If a sperm does not fertilize the egg within 72 hours of its release from the follicle, the corpus luteum will ultimately degenerate and menstruation occurs. However, if fertilization does take place and the resulting embryo continues its development, hCG is produced. This causes the corpus luteum to secrete the two hormones estrogen and progesterone to ensure favorable conditions for the implantation of the fertilized egg. In fact, the presence of hCG in the serum or urine is the first indicator of early pregnancy.


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Dr. Patil’s Fertility and Endoscopy Clinic

Center for Assisted Reproductive Technology, Endoscopic Surgery and Andrology

No 1, Uma Admirality, First Floor, Bannerghatta Road, Bangalore - 560029
Ph: 080 - 41201357, 41462419 Mobile: 9945221622
E-Mail: drpatilsclinic@gmail.com

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