2026 · ACS omega · open access
Chen et al.
This study demonstrates that a memristor sensor can identify distinct electrical signatures in saliva and urine corresponding to different ovulation phases, suggesting a potential route for noninvasive home fertility monitoring.
A paraphrase to the Library’s standard, never the abstract. The source is one link away and is always the authority.
2023
In 20 women providing 73 paired samples across menstrual‑cycle phases, urinary metabolites measured at home correlated strongly with serum hormone concentrations (estradiol R²=0.96, progesterone R²=0.95, LH R²=0.98). When the derived equations were applied to a separate set of 20 users, predicted serum values correlated 0.92–0.94 with actual measurements. This suggests home urine testing could substitute for clinic blood draws in routine fertility monitoring, though the cohort was limited to women with normal cycles.
Predicting serum hormone concentration by estimation of urinary hormones through a home-use device — Pattnaik et al., Human reproduction open · source ↗
2023
Researchers developed a flexible electrochemical immunosensor with micropyramidal electrodes that detects salivary progesterone and β-estradiol at sub-femtomolar concentrations within minutes. This patient-centric approach enables decentralised, centrifuge-free monitoring of ovarian hormone cycles through simple saliva dilution, offering a practical platform for at-home reproductive health diagnostics.
Tip-Enhanced Sub-Femtomolar Steroid Immunosensing via Micropyramidal Flexible Conducting Polymer Electrodes for At-Home Monitoring of Salivary Sex Hormones — Li et al., ACS nano (paywalled) · source ↗
2021
Four dried urine spots across a day matched a 24-hour liquid collection for 17 reproductive hormones and metabolites, with intraclass correlations above 0.90.
Reliability of a dried urine test for comprehensive assessment of urine hormones and metabolites — Newman & Curran, BMC Chemistry · source ↗
2019
This study found that dried urine metabolite patterns followed serum concentrations. It shows excellent agreement for the 4-spot method versus 24-hour collections and dried versus liquid urine, with intraclass correlation coefficients greater than 0.95.
Evaluating urinary estrogen and progesterone metabolites using dried filter-paper samples and GC-MS/MS — Newman et al., BMC Chemistry · source ↗
2019
The assay quantifies salivary progesterone with a 5.5 min run time, LLOQ 20 pmol/L, CV and bias <11%, and mean recovery 91%, and it was applied to profile progesterone across the menstrual cycle and during the luteal phase in women, enabling high-throughput, home-based hormone monitoring.
A novel high-throughput assay for the measurement of salivary progesterone by liquid chromatography tandem mass spectrometry — Schiffer et al., Annals of clinical biochemistry (paywalled) · source ↗