Kisspeptin levels in the blood rise throughout pregnancy and may serve as an early biomarker for miscarriage, pre-eclampsia, and other pregnancy complications.
4 complications detectableKisspeptin levels may help detect miscarriage, pre-eclampsia, gestational trophoblastic neoplasia, and fetal development issues
What the researchers found
Plasma kisspeptin levels rise significantly throughout pregnancy, primarily produced by the placenta. The review found that kisspeptin levels could serve as a biomarker for detecting miscarriage risk, pre-eclampsia, gestational trophoblastic neoplasia (GTN), and fetal development problems. Kisspeptin may also play a role in triggering labor by stimulating oxytocin secretion during term pregnancy.
Why it matters
Early detection of pregnancy complications like miscarriage and pre-eclampsia can save lives, but current biomarkers are imperfect. Kisspeptin offers a new window into placental health that could be measured with a simple blood test. If validated, kisspeptin levels could give doctors an earlier warning of pregnancy problems, enabling earlier intervention.
How the study worked
This is a narrative review of published studies examining kisspeptin levels during pregnancy. The authors synthesized evidence on kisspeptin's role as a placental hormone, its trajectory across trimesters, and its associations with pregnancy complications including miscarriage, pre-eclampsia, and gestational trophoblastic neoplasia.
What this study cannot tell us
As a narrative review, the paper does not perform quantitative pooling of data. The studies reviewed varied in sample sizes, measurement methods, and kisspeptin assays used, making direct comparisons difficult. Standardized reference ranges for kisspeptin across pregnancy have not been established. The mechanism linking kisspeptin levels to specific complications is not fully understood.
How to read the evidence
This is a narrative review synthesizing observational studies on kisspeptin levels during pregnancy. The evidence is suggestive but not yet sufficient for clinical implementation — prospective validation studies are needed.
When this study was published
Published in 2019, this review captures a growing body of research on kisspeptin in pregnancy. The field has continued to advance, with ongoing efforts to standardize measurement methods.
The bigger picture
Kisspeptin is emerging as one of the most versatile peptides in reproductive biology. Beyond its established role in puberty and fertility (where it controls GnRH release), this placental function adds an entirely new dimension. The idea that a single peptide could serve as a biomarker for multiple pregnancy complications — and also play a functional role in triggering labor — highlights how peptide signaling underpins the most critical moments of human reproduction.
Questions still open
- Can standardized kisspeptin reference ranges be established for each trimester to enable routine clinical use?
- How early in pregnancy can kisspeptin levels reliably predict miscarriage risk compared to existing markers like hCG?
- Could kisspeptin-based interventions (not just measurement) help prevent or treat pre-eclampsia?
Common questions
What is kisspeptin and why does the placenta produce it?
Could a kisspeptin blood test replace current pregnancy monitoring?
Read the original research
Kisspeptin as a potential biomarker throughout pregnancy.
European journal of obstetrics, gynecology, and reproductive biology, 240, 261-266
Citation
Hu, Kai-Lun; Zhao, Hongcui; Yu, Yang; Li, Rong. (2019). Kisspeptin as a potential biomarker throughout pregnancy.. European journal of obstetrics, gynecology, and reproductive biology, 240, 261-266. https://doi.org/10.1016/j.ejogrb.2019.07.016