Hormonal Regulation and Biomarker Identification in Female Reproductive Physiology

Female reproductive function is governed by a hierarchical hormonal network, the hypothalamic–pituitary–ovarian axis, in which pulsatile release of gonadotrophin-releasing hormone induces sequential secretion of luteinising hormone and follicle-stimulating hormone. These signals drive ovarian follicle recruitment, oestradiol synthesis and subsequent progesterone production by the corpus luteum. Feedback loops between ovarian steroids and central gonadotrophin release dictate the timing of the oestrous or menstrual cycle and ensure uterine receptivity. Disruption of this balance underlies common disorders such as anovulation, luteal insufficiency and subfertility. Contemporary research has focused on identifying specific molecular markers in accessible biofluids—saliva, plasma or milk—using proteomic, metabolomic and transcriptomic approaches. Such biomarkers offer non-invasive tools for cycle staging, early pregnancy detection and fertility assessment in both human healthcare and animal production. Advances in high-throughput mass spectrometry, nuclear magnetic resonance spectroscopy and machine-learning algorithms have enabled the discovery of panels of proteins, metabolites and transcripts whose dynamics closely mirror endocrine states. The ultimate goal is to translate these findings into practical assays for reproductive monitoring, personalised treatment of hormonal imbalances and improved herd management, thereby addressing global challenges in human reproductive health, livestock productivity and biodiversity conservation.

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Hormonal Regulation and Biomarker Identification in Female Reproductive Physiology publication trend

The graph below shows the total number of articles in hormonal regulation and biomarker identification in female reproductive physiology across all publications each year (not limited to Nature Index journals).

Technical terms

Hypothalamic–pituitary–ovarian axis: central hormonal cascade in which the hypothalamus, pituitary and ovaries coordinate reproductive function.

Oestrous cycle: recurring series of physiological changes in some mammals, regulated by fluctuating oestrogen and progesterone levels.

Biomarker: measurable indicator of a biological state or condition, used for diagnosis or monitoring.

Proteomics: large-scale study of proteins, their structures and functions, often by mass spectrometry.

Metabolomics: comprehensive analysis of small-molecule metabolites in biological samples, revealing physiological changes.

Transcriptomics: examination of RNA transcripts to profile gene expression patterns across tissues or fluids.

Non-invasive sampling: collection of fluids or tissues without surgical or intrusive procedures, preserving welfare and compliance.

References

1. Comparative Proteome Profiling of Saliva Between Estrus and Non-Estrus Stages by Employing Label-Free Quantitation (LFQ) and Tandem Mass Tag (TMT)-LC-MS/MS Analysis: An Approach for Estrus Biomarker Identification in Bubalus bubalis. Frontiers in Genetics (2022).
2. Salivary cell-free HSD17B1 and HSPA1A transcripts as potential biomarkers for estrus identification in buffaloes (Bubalus bubalis). Animal Biotechnology (2022).
3. Saliva and plasma metabolome changes during anoestrus, the oestrous cycle and early gestation in the mare: A pilot study. Theriogenology (2024).