Track puberty, hormones, and periods across early teen years
Part of Women’s health & pregnancy clinical trials.
This study follows girls before and after their first period to measure how reproductive hormones and menstrual cycles change over time. It may help researchers understand who is at higher risk for hormone and period problems, like PCOS.
Summary written for real people, not researchers, by Clin2.
Who can take part
- Be within the study’s age range and timing of puberty (before first period, soon after, or years after).
- Have a weight and BMI in a “healthy” range (not below the cutoff and below the BMI percentile limit).
- Have signs of puberty appropriate for your stage (for pre-period: some breast development).
- For later parts, have blood tests showing normal thyroid hormone, prolactin, and testosterone (and sometimes normal iron levels).
- Be willing to avoid hormone-affecting medicines/supplements (like birth control pills or biotin) for the next 1–3 years (or 1–2 years for intensive parts).
Quick eligibility check
Answer a few plain-language questions, based on this study's own requirements, to get a preliminary sense of fit.
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