Early Luteal Phase Progesterone Kinetics After hCG-Induced Ovulation in Modified Natural Cycle

This pilot study evaluates how progesterone levels change after hCG-triggered ovulation in modified natural cycles. Forty women preparing for frozen embryo transfer will have blood tests over 6 days to monitor hormone levels. The goal is to understand whether hCG affects the timing of the luteal phase and embryo implantation.

NCT Number	NCT07028710
Lead Sponsor	University Hospital, Montpellier
Conditions	Luteal Phase Insufficiency
Enrollment	40 participants
Start Date	2026-01-12
Primary Completion	2028-06-15 (estimated)
Study Completion	2030-06-15 (estimated)
Updated on ClinicalTrials.gov	2026-06-22