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References from Serum progesterone as clock and gauge in natural cycle frozen embryo transfer. Local targets link to admitted publications; unresolved targets remain external evidence.
Optimizing embryo transfer timing based on serum progesterone levels from a known implantation cohort: a retrospective observational study
10.1016/j.jfma.2025.07.027 · 2026 · External reference
Home-based monitoring of ovulation to time frozen embryo transfers in the Netherlands (Antarctica-2): an open-label, nationwide, randomised, non-inferiority trial
10.1016/s0140-6736(23)01312-0 · 2023 · External reference
Low progesterone levels on the day before natural cycle frozen embryo transfer are negatively associated with live birth rates
10.1093/humrep/deaa092 · 2020 · External reference
Progesterone-based ovulation timing versus LH surge monitoring in true natural cycle frozen embryo transfer: impact on live birth rates in a prospective cohort study
10.1093/humrep/deag109 · 2026 · External reference
