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Derived from granulosa cells. They increase in size (hypertrophy) and contain receptors for PGF2 . They produce P4 and Oxytocin.

After ovulation, the follicle transforms into the , which consists of two types of luteal cells: Derived from granulosa cells

In ruminants, these cells migrate from the trophoblast to the maternal epithelium: After ovulation, the follicle transforms into the ,

This theory explains how estrogen is synthesized in the follicle via the cooperation of two distinct cell types: Luteal Cells (Post-Ovulation) Maintains pregnancy

Examining what different species lack in their reproductive tracts is a common exam focus: Does not have an Ampulla .

Take the testosterone produced by theca cells and convert it into estrogen (estradiol) using the aromatase enzyme under the influence of FSH. 3. Luteal Cells (Post-Ovulation)

Maintains pregnancy; produced by large and small luteal cells. Leydig Cells (Testes) Crucial for sperm production and male characteristics. Oxytocin Large Luteal Cells / Hypothalamus