The human corpus luteum: life cycle and function in natural cycles.
Level 5 - mechanism / opinion, no new human data
Narrative review synthesizing mechanistic, molecular, and clinical literature without systematic search methodology
PubMed 18793774 · doi:10.1016/j.fertnstert.2008.07.1745
What was done
This narrative review synthesized published basic and clinical research on endocrine signaling between the hypothalamus, pituitary, and human corpus luteum (CL). It reviewed autocrine and paracrine mechanisms, key regulatory genes and proteins during CL development and regression in natural cycles, CL responses to in vivo hCG administration, and luteal phase ovarian and endometrial Doppler ultrasound assessments.
What was found
The abstract provides no quantitative data or numerical findings. It reports that CL maintenance, neovascularization, and steroid hormone production depend on luteal cell subpopulations, and that local paracrine and autocrine mechanisms regulate CL lifespan and its rescue by hCG.
Why it matters
Understanding the molecular and hormonal mechanisms governing the human corpus luteum clarifies normal luteal function and informs therapeutic approaches for luteal defects and fertility regulation.
Limits
The paper is a narrative review with no systematic search methodology, explicit inclusion criteria, or risk-of-bias assessment. No sample sizes or primary quantitative effect estimates are provided in the abstract.
Cited by
- supports The corpus luteum has a lifespan of approximately two weeks unless rescued by human chorionic gonadotropin (hCG) from an implanting embryo.