Progesterone as a surprise ovulation trigger: small study explores new possibility
Knowledge-focused
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This small pilot study will test whether giving progesterone vaginally can trigger ovulation in healthy egg donors aged 18 to 33. Participants will receive mild ovarian stimulation and then progesterone when a follicle reaches a certain size. Researchers will measure hormone leve…
Phase: PHASE4 • Sponsor: Instituto Valenciano de Infertilidade de Lisboa • Aim: Knowledge-focused
Last updated May 17, 2026 08:52 UTC